Just one of the double tags is printed on

I assume by double tags you mean 2 labels across the roll.
You need to tell your software that the roll is 2 across.
If using the software that comes with the printer, Zebra designer.
Set your label width to twice the single label and copy the barcode so that you have 2 across the label, then print





I assume by double tags you mean 2 labels across the roll.
You need to tell your software that the roll is 2 across.
If using the software that comes with the printer, Zebra designer.
Set your label width to twice the single label and copy the barcode so that you have 2 across the label, then print