**Update - I restarted my phone again to see if it sent out old texts, and sure enough it sent out every text I had sent and recieved between my last reset and this current one, plus a lot of other older ones from my blackberry days. Not a good thing.
bump....and a follow up
So after looking into the problem net-wide, I've come across 3 or 4 posts on other android sites/htc site/att wireless site that all have a 1 post thread with a similar problem but no replies/solutions.
I did the next logical thing and called ATT. After hassling me for even restarting my phone, which should obviously be an acceptable feature of any phone (/electronic device), he told me he had never heard of the problem and that it was an HTC issue, not an ATT issue. He gave me the HTC number and that was that.
to reconfirm, my phone not only tweaked out and re-sent texts that I had sent, but full conversations that included sent and received texts, all back to the person who I was texting with. It crashed my poor girlfriend's Iphone due to over 500 texts being re-sent.
So anyways, I call HTC and they say its an ATT issue, especially since some of the text's re-sent were from when I was still on my Blackberry over 2 weeks ago.
My next course of action is going to be visiting ATT in person, but I wanted to check in again with the community to see if anyone had any ideas/had heard anything else on this.
I can rule out sim card since I was given a fresh one when I bought my Inspire, and I know it happened to my sister's phone (she got a new Inspire the same day). We both got our phones from the same store, so maybe its a bad batch perhaps, but that seems unlikely; the phone has been great otherwise (we're also on separate family plans, so no cross-over coincidence there either). The text-freakout happened on my 2nd full reset, and until I get more news I wont be restarting it again.
The phone is also completely stock.
So....yeah, odd.