Now I’m really confuse….

Well, I had several blogs-most of them were upgraded by WPAU around 2-3 weeks ago and its work amazingly (as always). I posted to those blogs without any difficulties. But today… after I deleted some plugins (that I don’t need-and yes I had deactivated it first), my dashboard suddenly become to WP 2.6 again. And it ask me to upgrade to 2.7 …..! After 3 weeks it turns back to old version again? I also lost some of my latest post and comments. I really confused and now I’m afraid to log in to others. Could anyone tell me what to do-please ? are there something to do with ftp error report? It appear when I’m deleting one of the plugins. thanks before…