Alright, when this happened I wasn't paying much attention to the numbers under "cash" so I'll base this on partial skepticalism.
I was expanding a few m2 on one of my research centres when, right after the "expansion has begun" screen, I got backscreened into the last page. This time, I accepted the expansion again. What I think happened was that the money was credited twice. As I wasn't paying much attention, I cannot be sure. However, I got the "expansion has begun" screen twice, making be believe of this possibility. If there was a double expansion, I suggest that this be verified by the staff to see how it can be fixed in the future.
Double expansions - possible game flaw
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