I think something went wrong when I paid in to join BioniLUG. I have an e-mail dated May 17th confirming the details of the payment ($10 USD to Jon Reddick for BioniLUG Membership). I don't appear to have been added to the BioniLUG members group and I can't access the BioniLUG discussion forum. I don't see any sign that I'm currently a member of BioniLUG so I'm assuming the problem was in joining the group.
This is normal after paying for specific packages on BZP. It happens with Premier Membership, and I'm sure the same happens with BioniLUG Membership as well. You can either wait a little bit longer for the group change, considering the staff are pretty busy with multiple things right now and are probably just a little behind, or you can send a PM to Black Six, and he'll sort things out.