Sluggoswe

I tried to Google but can't find a way to downgrade, do I even have engine 3 when I just bought the pack?

I'm playing the American campaign now and as soon as I get some artillery on the german ridges they just pack up their mgs and runs away. Most are cut down but some irritating survivors are crawling around in the craters. The same goes for when I'm using my support halftracks, one HE round and they pack their stuff and try to run away. I'm not enjoying it at all and I've just put 80$ into FI and GL since I wanted to assault some hills. Any update about if they are looking into these issues?