Thanks for the reply. I have no problem with the spritesheet.
I don't want different tilemaps, though, I want different instances of the same tilemap. Especially since I'm updating this tilemap pretty frequently, I don't want to have to reimport it into tilemap clones each time.
Here's what I mean. I have my tilemap already made:
When I drag it into a new level
It comes with tiles already on it from a different level that I have to erase.