Yes, that's normal. The switches turn off and on some spikes, so the dungeon layout changes with each switch. It's part of the riddle.
I can't complete this quest, I have every switch pointed to the left, but the spikes un the top right to go fight the boss doesn't let me pass trough :C
Did you look at the image I posted here earlier? Two of the switches have to be turned twice.
If that still doesn't help, a recent update introduced the "riddle keys," which can be used to disable all spikes in the dungeon.
ohhh I have two of them! Thanks for the help!