Slitherine

So, i have playd soviet corps on my ipadfor a While now, and just got to operation Saturnus when i realized that the music was wrong. I have soviet corps on My computer as well, and know that there is a Russian inspired soundtrack for this campaign. But i only have the original soundtrack for both my soviet corps and allied corps campaign. Is it supposed to be like this for the ipad? Or is it a bug? And in that case, is there something i can do to fix it?
Just gotta say that i downloaded the panzer corps lite so that i coud choose what dlc s i wanted.

Just noticed, panzer corps lite is only version 1.0 is there no way to update the game. Even though i have bought soviet corps and allied Grand campaign?