ngbk1993:
I think due to un-active for sometime and the moderator removed my membership?
Moderators don't delete accounts due to inactivity. We only take action based on rule violations. When that is severe enough (99.99% of the time spam bots), the approach is to permanently ban people, which doesn't cause this "Guest" thing, which only comes from an account being deleted. Usually when you see this "Guest" it's because the forum member deleted their own account.
However, I seem to remember some years back there were some unreliability problems with the forum and the solution was to purge a bunch of inactive accounts. I would guess this was the cause of your previous account's "Guest" status.