@Ana225, In response to your question about the removal of funds from one apartment or the other, this is not what will happen. As far as your dealings with Airbnb, they consider that you have one account through which all your funds flow. What you are requesting is not likely to be possible at this time and it's a private financial split that you will need to manage at your end.
As other writers @Gerry-And-Rashid0 have said, it appears that your settings need updating to prevent one night stays, if your preference is for 3 night minimums. In this case it may have been preferable to allow the booking to stand and all the transactions would have stood on your books against the one venue, you might have even earned a 5 star review.....
Small losses will occur from time to time.
Sorry about that. We all make little mistakes along the way.
Best regards, Christine.