Multiple Bingos

How is it that some players win multiple bingos, when the app offers one or two bingo cards? Ive seen one player win as many as 5 bingos. Ive reported this several times and yet nothing has been fixed.
I play this game as a relaxation, it would be nice if all players had the same opportunity to it enjoy it.

Jennjersnapps about Bingo Crack™, v2.0.3