So, if you're suddenly seeing "Ex-member" by your username there are 2 explanations

1. You deregistered for some reason.
2. There's a corrupt file on the system thats buggered up the information the forum needs to log you in.

Unfortunately the latter does happen more often that many would care to admit but it's hard to complain about it when the forum software used is completely free to use. 

So, if you haven't deregistered then you need to contact me at donegalpaul@thepilgrimssc.co.ukand let me know.
I do do reasonably regular backups of members information so hopefully you wont lose too much information when the problem is sorted.