Not printing confirmation page

it is normal, just mixing, continue printing, it will slowly cover the page till the entire page is printed or copied, dont worry, just reuse the half printed paper till when the pages print complete.

The printer does not support duplex coping. If you want to do manual duplex copying, you can make a copy of the first page.
Then reinsert the paper upside down in the manual tray or paper tray, fil the page on the document feeder and make the back copy.

Press MENU - 2 4 1 then you can choose to have that feature ON or OFF. the +Image means that it will also print a copy of the first page sent so you can actually verify the document sent.

Mel, this is what I found in the online manual:

Set the Ink Drying Wait Time longer.
Doing so gives the time enough to dry the printed surface so that paper curling and ink blots are prevented.

(1) Make sure that the machine is turned on.
(2) Open the printer properties dialog box.
See Opening the Printer Properties Dialog Box Directly from the Control Panel.
(3) Click the Maintenance tab and then Custom Settings.
(4) Drag the Ink Drying Wait Time slide bar to set the wait time, and then click Send.
(5) Confirm the message and click OK.


Make sure that the actual size of the paper is suitable for automatic duplex printing.
The sizes of media suitable for automatic duplex printing are A4, Letter, A5, B5, and 5" x 7".
Load paper of suitable size and then press the OK button.
Make sure that the Page Size or Paper size setting matches the actual size of the paper with a size suitable for automatic duplex printing.
First, check the Page Size or Paper size setting in the application software you are printing from.
Then, check the Page Size setting on the Page Setup sheet in the printer properties dialog box (Windows) or the Paper size setting on the Page Setup dialog box (Macintosh).
Note
Depending on the version of the application program, the automatic duplex printing may not be supported.
Make sure that the type of loaded paper is suitable for automatic duplex printing on the Main sheet (Windows) or the Quality & Media sheet on the Print dialog box (Macintosh).
Note
To switch to manual duplex printing, follow the procedure below.

Open the printer properties dialog box, clear the Automatic check box on the Page Setup sheet, and reprint.
When performing manual duplex printing, note the following.
If you are printing three or more pages of a document with manual duplex printing, one side of all sheets of paper will be printed first. Turn over the paper and reload the paper in the machine, and then the reverse side of all sheets of paper will be printed. Be careful not to change the order of paper in the stack.
The procedure for reversing the paper varies depending on the staple side and printing orientation. Follow the on-screen instructions.
MX850 series On-screen Manual for Windows:

http://www.usa.canon.com/consumer/controller?act=ModelInfoAct&tabact=DownloadDetailTabAct&fcategoryid=334&modelid=16279

Click on this link or copy and paste the complete link into your browser.
If I could be of further assistance, let me know. If this helps or solves the issue, please rate it.
Thanks, Joe


I’m happy to assist further over the phone at https://www.6ya.com/expert/joe_8b8c2cd6ce148309

Scroll through the menus for REPORT PRINT to set confirmation.

When you call up your printer (usually [Ctl][P]) tell it to print even numbered pages only, but in reverse order, This means the last page to be printed will be page 2, and it will be face down on the top of the pile (blank side showing) Take the printed sheets and rotate them so the top (head) of the sheet is feeding back into the machine, with the blank sides up. Now call your print up again and tell it to print the odd pages only. The first sheet to be printed will be page 1 which will print on the blank side of page 2, and all the rest will follow in sequence, with the correct sides up. Works every time. The print control is part of the Windows system, so your application should provide the full functionality.

By default, a Fax Confirmation report (Fax Call Report) will only print when a fax error occurs. However, this option can be changed using the printer control panel.

1. Press the right arrow until Reports appears in the display, press the checkmark.
2. Press the right arrow until Fax Call Report appears in the display, press the checkmark.
3. Press the right arrow until Print Report appears in the display, press the checkmark.
4. Right arrow to the option of choice, press the checkmark to save the change.

FAX call report options

• Send Fax Only - a confirmation sheet will only print when a fax is sent
• Never - no fax confirmation sheets
• Every Error - default setting
• Send Error - a fax confirmation prints when the fax transmission encounters an error
• Every Fax - a fax confirmation sheet will print for incoming and outgoing faxes
• If I could be of further assistance, let me know. If this helps or solves the issue, please rate it.
  Thanks, Joe
  

I’m happy to assist further over the phone at https://www.6ya.com/expert/joe_8b8c2cd6ce148309

This is not the fault of the printer but the fault of word.

The way I did it successfully was as follow:
File > Page Setup > Layout = Landscape (sounds like you have already done this)

In the print dialoge, instead of OK, click Properties. On the layout tab, select landscape and below that select pages per sheet = 4 and then click ok... Then click OK to print.

here is the manual

http://www.retrevo.com/s/brother+4100+manual

I guess you are using word. In that case the default driver you use and comes standard with windows is flawed. Download a new one from HP.