Could somebody explain please what is exactly RLMT through Milkround that gives 30 points instead of 20? Is it basically graduate jobs that appeared there?

I am a new graduate with 35k as a base pay and 5k as flex allowance - will it be counted as 40k?
Also I heard that graduates who got RLMT through Milkround get extra points. If its a graduate position at BP does it mean it's likely to be through Milkround?

Just did call the register office and they said the Home office has to send me the ceremony invitation letter and not them hmm... Told me to contact the Home office instead. Shall I wait for 21 days as it says in the letter or do it now?

Got the citizenship application approved on 14/08 but I still have not received the ceremony invitation letter. I read on other ( older ) threads that it MUST be booked within 21 days after the approval date. Is it still the case? Should I contact the local council to be safe? In the approval letter...