if you send a message to the dev saying what happened, he would probably give you the difference in credits- he seems quite reasonable. If you could have gotten more by just refreshing, and you spent the GP to spin, I could easily see him being ok with giving you the higher amount.

i needed some credits badly, so i span the galaxy wheel a total of 3 times(1 time to test it). When i span the first time i got 5x current credits, then i span a 2nd time and i got 5x credits, and then i closed the screen opened it again and i got 3x time credits. However, that's not the bug.

I started with about 1.3million credits and i got 5x which gave me about 6.5million, then i span it again and i got 5x again and it said u received 6.5million again. But then i thought why did i get the same amount if i had 7.5 million, i should have gotten something a lot bigger. So i closed the screen and then span again to check what happened so after that i got x3 and at that moment i had about 13million and it said you received 36 million so i got 36 million in the end.

But if everything went correctly i should have gotten 97.5 million.
because:
start ->1.3million x5->6.5million x5->32.5 million x3 ->97.5 million
actual -> 1.3million x5->6.5 million x5(which actually was more like +6.5million) -> 13million x3 ->36 million.

Basically it took the first amount and used it again when i pressed "spin again?" button

All these numbers are approximate to the nearest million.

had i closed the screen instead of pressing "spin again?" after the first time i would have gotten 97.5 million