yup if you're on a set of stairs that isn't the main one of that floor, it got its own section of mapping to worry about. Somtimes you can just go down/up then immediately go up/down to activate the jump cuz you've done the mapping already.
Got to 3rd Stratum but still haven't finished Petaloid quest from the 2nd Stratum, can someone tell me the coordinates? :3
Working on that one myself now... ugh. Can't remember what floor the damn poison butterflies were either.