You finished second in conference (lost in the league semifinals), so overall you tied for third and fourth place overall. Your win/lose ratio over the season wasn't all that great (13/9).
All that being said, you are right in saying the value is too low. There has been a small imbalance in the code which calculates the last season performance for some teams (teams that qualified for the playoffs, but had none or only one playoff win). I've now fixed that and added a bit extra for the teams that were affected for the next two games, to balance out the possible lost income.
It was a honest mistake made during the preparations for this season, which was full of changes, so such small imbalances were easy to miss. I take full responsibility and hope my fix will be a fair solution for the problem.