So i think this is a known bug, that the nano credits, the stuff you get from the aliens when they die, which is used to upgrade your suit in singleplayer, resets back to 0 after your reload, or exit the game and later go back to playing.

Is there any way around this? Like a temp fix of some sort?

http://www.gamesas.com/forums/viewtopic.php?f=40&t=12164