Finally! Nightmare 9 now works as intended. Traps at the bottom work, and the first trap the crowd encounters doesn't suck them up so that they all drop to the main area. All I did was download your styles a few posts above. I didn't have to do anything else. You have made me one happy person. The only other issue was the Sega levels loaded but the levels appeared all messed up. I managed to fix that by simply removing the Sega style folder and copying over another Sega styles folder I had that has way fewer files (121 vs 245 before). Perhaps if you have time you can load the Sega levels and see if they're also messed up. If so, I can send you my Sega style folder.
Also, for Fun 5 I managed to fix that even with the Reunion styles folder in my Superlemmini directory. I managed to compare the crystal ini file in the Reunion one with the crystal ini file of the normal styles folder, and it turns out a few lines were missing from the Reunion ini file. All I did was backup the crystal ini file in Reunion, delete all the lines in the ini file, and then copy everything from the crystal ini of the normal styles and paste it in the crystal ini file of the Reunion one. Then I tested the level again and now the lemmings can exit.
I compared the brick ini files and same thing: some lines are missing in the Reunion brick ini, so I did the same thing. Before that, in Wicked 1 the lemmings wouldn't get killed by the stomper trap, but once I copied over the ini file in the normal brick style, they now get properly killed. So, that probably means this needs to be done with all of the normal styles, meaning just the original lemmings and ONML styles. Easy fix, just annoying to do. Perhaps once I do that I can send all of the style ini's to you.
Once again, thanks for the help with Nightmare 9.
edit: actually, I'm a dumb dumb. Can just simply copy and paste the ini file rather than open the ini files and select all the lines and copy/paste in notepad.