To make it clear, the "elite" group was created by a copycat that is in it to better his own bank account. It was originally named exactly as the official group but when I made fun of him for copying it, he added "elite" to the name. Lets not get into it further though, we don't talk about them in the FB group and I would rather not get into it here.
There is no way that I know of to "block" someone from seeing a FB group unless it is marked hidden or secret. Give me a few minutes to see if I can see anything in the log.
Edit: I talked to the other staff. You have staff of the group blocked. Unblock the staff and you will be unblocked.
Edit2: Either that or you have your privacy settings set to block your page. Let me know if this is it as we are discussing the situation in general.