I'm doing the stacking but I didn't receive the last two income transactions, they have a question mark next to them and it says "Generated but not accepted", does anyone know why?
That's exactly what it means, that it was generated but not accepted. Generated coins are not always accepted.
And cool fact that I heard a while ago, if you stake with two wallet on two different computers with the same wallet address, then you're going to get more orphaned stakes more often.