Well hip-hip-hooray! It finally popped! I started playing again with lvl 9 characters, re-did Inphyy, Aspharr, Tyurru, and Mynfiee, which caused the achievement to pop. Thank God, I was getting seriously aggrevated with this game.
Now, if only I knew if this was because of a glitch or because I has previously missed a level...
10k 29/03/09 - 100k 17/07/10 - 200k 02/09/11 - 300k 02/02/13 - 400k 20/11/13
Achievement #1000 - Seek and Destroy - Achievement #10000 - Fully Evolved
Overachiever: 54 points - Arcade Crazy: 19 points - 14 Staff Clubs