Alphauserpoints earning points on points purchases

-- HikaShop version -- : 2.3.3
-- Joomla version -- : 2.5.25

Hi there,

I've just noticed that when a user uses points to fully fund a purchase, they actually earn points on the entire amount.

So, for example if a product is $50, and the user pays using of points ONLY they still get points on a $50 purchase.

Here is the really weird part! If a user pays for a product partially with points, they only earn points on the non-points value of the transaction (this is correct and what I'd expect).

I'm clueless what could be wrong here. Any ideas?