As I have written in the message of the day, we have had some trouble with game shape training being calculated wrong, not having any effect actually. In an attempt to fix this, I have rerun training for teams that trained game shape (your team included) and recalculated the game shape based on last week's minutes and form. This resulted in a raise of game shape in most teams, but sadly, I initially included minutes from private B3 games by mistake (it's quite late here, or, more accurately, quite early). This resulted in your team and some others actually dropping in game shape, even though the recalculation now included the game shape bonus from actually training game shape.
So, I have recalculated form again and now it should be fine, much better than before, at least in general (there is a random factor in there that I cannot control).
Also, there were some other problems with skill drops but I think I fixed that too, so you should be OK now.