The game mentioned going another path but I could not find an alternate route to take to et to the next area. I have beaten the game have over 2m Pix, merchant level at 27. I could care less about my shop as of now as I am in very good standings.
We're Americans! We don't quit just because we're wrong.
We just keep doing the wrong thing until it turns out right.
Erm, if you havn't gotten past the 15th floor, then I assume your at the 2nd dungeon. The dungeons don't really get more floors but instead you unlock more dungeons through events in town.
I suggest looking up the wiki for conditions on unlocking the other dungeons.
Playing: Blades of Time (PS3), Mass Effect 3 (PS3), Ayakashi (Android, invite code Magi)
If you defeated the boss on the end of Jade Way, you need to do some events around town to get the next (Amber Garden) to open up. Note this dungeon is a bit harder, and has more levels. After that there's another which can be a pain to open up as it requires more specific triggers.
However, if you spend a lot of time diving into dungeons you probably are going to fail your payments. Unless you get lucky with chest contents . . .
"When you appear to be doing nothing at all, you're doing it right."