@DRindox
Hi there,
There is nothing wrong with the interest. The interest is added to the Savings and not directly on the balance. If you check your Finances you will see how much interest you will get after the match. If you add those up to the amount of Club Funds you already had in Savings before the match, that number should be the same as the amount of Club Funds you have on Savings after the match.
If that's not the case, then you can create a new topic and post some screenshots of your Finances before and after a match.