If the system is a bit like in Hattrick, then we've got 2 factors influencing game shape.
1) "The background shape" which could be affected by the long term, thus a few weeks ago untill now, since the rules state the gameshape is truly calculation over a few weeks of time.
2) "The standard game shape" which only seems to be affected by the current week.
Those two make the new gameshape.
Just as in HT where your real gameshape might change depending on a change in the background shape (up or down).
Maybe the comparison with HT isn't that good in this case, but that might clarify some of the randomness in game shape calculations.