I redid customizer and installed blur this time and first text received was not a double, why don't you try this and see is something is wrong with the aosp messenger.no, don't do this. unless handcent got entirely re coded it piggy backs off of the official messaging app. this might screw things up for ya.
Edit: You lose the ability to use MMS if you delete the stock messenger and just use handcent.
well it let me send MMS just couldnt recieve them. i use the liberty customizer to reinstall the ASOP messaging and im going to try and use goSMS.
after i reinstalled the ASOP messaging it started double texting again.
for some reason when i tried the blur messanger would open and close really quick. i uninstalled that did the ASOP and installed GOsms which actually works great without any doubles.