Cannot use more than 1 tile set

Hi guys, I'm making an RPG-esque game that will need a lot of graphics, I ran out of space on the first graphics asset Tile set (BckCHR_00), I made more graphics on the second graphics Tile set (BckCHR_01) but I cannot make NESmaker have graphics from the 2 different tile sets.

While in the overworld as soon as I switch to Tile set 01 the graphics from Tile set 00 become corrupted. I tried different things and nothing seems to work. Please help.

You can use only one BckCHR tileset per screen (24 tiles), but you can also add one BckSSCHR to supplement it (8 more tiles for 32 total) a bit further as well as use some path tiles with the pathing system (set up 4 path types).