I can't get far enough back in the archives to look at membership totals for past years. I DO know that when I joined in Feb. 2006 there were way less than 100,000 members. Site went online in early 2002.
Scroll to the bottom of the site main forums page - to the "What's going on?" line.
Not just you. Several members have had problems with extra characters, missing characters, weird cursor relocation, etc., etc..
Get into your profile and reset your word editor to/from WYSIWYG - see if that helps. You might think I'm nuts, but if you use a Logitech mouse, try a new one....... their online driver update site is one murderous bitch to use. Impossible.