Quick questions about groups

Guys i'm trying to solve problem with one group for some time and i couldn't find definitive answer what to do. Basicly when creating giveaway i can't see the group. I'm already in for almost a week and i sync account all the time. I saw some advices like wait 2-5 days for group to get synced with steamgifts, i'm sure that group exists longer than 7 days. Also somebody said i shouldn't be in more than 200 groups so i left some to get under, synced, didn't changed nothing either. And idea what might be the issue ?
And that brings me to my second question , did you ever had too many groups and didn't knew which one to leave? I know two dozens i would stay member in anyway, but my leech side simply doesn't allow me to leave groups where i might win some nice gifts here on steamgifts. Is there anyway to find all groups i'm member in and are active here on steamgifts any other way than through current group giveaways somebody made for them ?