I want know what is happening with my tags! Every time i alter my tags it dissapears like a day later or so.

It's most likely a fellow pmogger deleting your tags. If you go to settings you can change it so only friends can edit tags. It appears that there is a "tag war" going on right now, check out czarchrons thread for more info.
http://pmog.com/forums/forum-gam...

thats mean. I dont want my bevy tag deleted! bullies.

that's the one that is mostly getting deleted.

you can hide your tags or limit them to allies from the privacy settings.