Board Game Arena

I noticed that common points for a victory in backgammon are between 7 and 14 depending on difference in players' ranks. But sometimes when I lose I see my opponent gaining much more points. 24, 33, 42. How can it hsppen?

I guess you are talking about the ELO score. On the F.A.Q. you can learn how the ELO ranking is computed -> https://boardgamearena.com/#!faq?anchor=faq_account_elo

So I see it's s kind of beginners' bonus.