Hello, I have 100 posts and just 28 activity.. what happens? I thought every post is added as 1 activity
well your name speaks for itself

you're just so unlucky ben.
whoever told you every post is one activity had lied. just so you know the forum only updates every two weeks so you will have to wait. don't be in a hurry because there's nothing on top but a bucket and a mop.
hmm i still don't know how it's updating every two weeks because today it updated from 14 activity points to 28