multi activity AE confusion

Hi, I have been an AE since 2008 along with my wife, (conjointe collaberateur) We have a simple business providing services (BIC) and have declared the turnover trimestrielle.

In April 2024 I added two more activities using the INPI website.
1. Rental of furnished holiday accomodation (classé)
2. a liberal non réglementée (BNC) prestation service

A) We still carry out the first activity so I declare all three at the same time. So far I have added together our original services with the rental income because both are BIC. The third BNC activity is declared at the same time but in a separate field.

B) I have been doing more research and I think I need to separate the rental income because it should be charged at a lower rate. I have seen 6% 7% and 8% so that’s confusing, either way it’s considerably lower than the 22 ish % I pay for the other activities.

C) I have also discovered since April that I think the 1st activity should remain as the oldest. But on the INPI site I thought it said the 1st activity should be the one with the highest turnover. Another confusion.

Does any of this make sense to you? I expect you will have questions for me. I look forward to hearing back. Merci Alexander