If it for some reason spawned you on the level floor with no level there, I would use /kill to reset back to the main place, and then select the level again. Not sure why it would have done that though.
Alright, here's the video demonstrating the bug. I tried loading level 10 in a fresh map afterwards, the same result occurred for some reason.
Thanks so much for the video. It helped a lot. It took some digging, but what I THINK was happening is that levels 9 and 10 are pretty far away from the start location and I think they were outside of the loaded chunks. I redid the start area and setworldspawn to an area more centrally located so that everything required SHOULD be in a loaded chunk. My own testing shows it is not consistently loading level 10 as opposed to before when it was very sporadic. V1.02 uploaded.
Would like to know what exactly is not working on the map for you so I can see if it is something I can quickly fix. Any details?
The gold blocks and emerald blocks don't disappear when I stand on them.
EDIT: I found a solution, when I went into creative mode I triggered all the command blocks that is usually activated by the tripwire. This solved the problem. I'm guessing that when I originally loaded the map the command blocks hadn't all loaded in yet and I got teleported before the other command blocks could be activated, or something similar.