Well at least i've figured out what m does...
Aaah, I had pics for this but photobucket is down.😡
First off in the tile pages I hit "spacebar" to select by rows.
Alright. When you select a vertical row of tiles in the tilepages using shift, and hit "M" to ...uh..."m"ake them combos, what happens is that seems to not only select the entire page of horizontal rows as well, but if you start these on combo 0 then it wants to select tiles from tile 0...at least it did for me.
If this is confusing I have some pictures of this in zq..just not at the moment.