spaceANDY, yeah, lost some progress myself, but the game was down for the devs so they couldn't "keep" progress they hadn't been able to record.
Also, for lvl progress, go to your home and build a bloop trap, you can get an enormous amount of ex from it. :)
In Reply to Kyubbii, My favorite class in this game happens to be sniper, and it doesn't have any problems for me. Like in real life, don't get close to your enemy and wait until they're engaged to take them out