That's normal for anything above the 10000 condition mark - I usually stick to 15000 max, but that's because I enjoy losing a match once in awhile. .
As to the strikers, I've noticed that in general. That's more on FM 2014, which has really reduced the scoring effectiveness of strikers overall. It just seems more statistically significant only because you're getting more shots on goal, which is good! Most of my tactics for this year revolve around getting my AML/AMRs as the main scoring threat, and leaving the striker to play as a false nine, just to draw the defensive lines forward. You're not doing anything wrong - that's just how FM2014 is programmed this year.