I reached floor 8 and logged out. After logging back in a couple of hours later I went to continue thinking I could continue where I left off, not a chance but no big dramas, I'll just start again. However I noticed that all floors were available 1,11,21,31,41 and 51 even though I never made it that far. Why have I got access to floors 11,21,31,41 and 51? Am I progressing through on someone else's instance?