Bolts in floor for toilet are too short...

Never herd of wall tiles cracking. If you have access to the underside of the bathroom (via basement ceiling), you may want to check of the wall(s) has proper support for load or a non-supported floor plywood joint may have been installed the wrong way/not supported properly. You should be able to see the nails coming through the floor plywood where the wall(s) is located above. You may have to add blocking and/or brace(s) with joist hangers for support as required. Interior wall studs may also been spaced at 24"c/c instead of 16"c/c if the wall tiles were not installed by the builder not accounting for heavier than normal load.

If by chance the washroom is in the basement::

• Non-load bearing walls (interior non-loading will be supported by the slab.
• Load bearing walls will be supported by footing foundations

As for your toilet moving: the wax gasket may need replacing if not seated properly (rocking). If it just seems a bit loose, try to just tighten the flange bolts on both sides of the bottom of the toilet after removing caps. If no spacers are present between the bolts and the ceramic, they need to be there to not crack the base or reduce the chance of over-tightening that would do the same. There may be water coming from a shower that's close by or from the sweating of the tank in the humid summer months.

If the ceiling are closed for access below, you have the choice of tackling the job from within the bathroom by removing the some of the plywood floor to inspect the problem OR by the ceiling below. I would should the ceiling below if it was me.

Good Luck!

Haze remover, has acid in it so use proper gloves, talk to your local store........Home Depo

you are correct if you overtighten the bolts the tank will crack.
They make rubber spacers that go between the tank and the stool, that can be put in to help the part of rocking or wiggly, try that.

with your toliet making a crunching noise on the tile, my first question is does the toliet rock at all? i would try and tighten the bolts on the base or the next step would be to pull the toliet and put a new wax ring then tighten it down. It makes a crunching sound because part of it is hitting the tile so makes sure it tight to the floor

hi, the tile is supposed to go under the toilet flange (the thing you put the wax ring on), very common "oops", can be rectified by placing another wax ring right on top of the first on. best to make the first one a "horn type" wax ring, then put the plain one (no horn) on top of first and try to smoosh it on just enough to stay in place so when you install toilet it doesn't move,.....cheers!

Go to a hardware outlet(Lowe's, HomeDepot, etc.) and ask for a commode drain extension that can be placed over the existing and bring it up to the level of your floor. I also like the wax rings with the cup molded in. These can be doubled up also but not as reliable as the extension.
Eric

You need new longer closet bolts for the floor flange and you can buy an extra thick wax bowl ring.

check the seal between the tank and the toilet.tighten it as necessary. (not to tight! you will crack the ceramic). Mkae sure the tank is square to the toilet.
also the water inlet connector.