I figured out most of the problem: using friends/list.json method returned only 1 item, and that was the only one following my account and which i’m also following (i’m following more than one account) so when i got a 1-item list i thought it was returning the followers. to verify i stopped following and went through the process again and got the same result, that time it was because twitter wasn’t updated already.
so now the refined problem is that friends/list.json returns a 1-item list. and if i use friends/ids.json i get the full list.
i don’t understand why i only get 1 item