Karel Hallard

Most likely this is a bug but I was wondering how I get my roles back in my own group. This is what I did: I have a group and I am owner of it. I rejoined my own group while I was in it already (did not know this was possible) Now it still says I am owner of the group but all the right I have are gone and I cant invite people and/or write group notices etc.. How to solve??? Thanks