First recommendation is to reboot your device... either Power off, and Power up... or Press and hold the Volume Down button, then while that is held down press and hold the Power button, keep them both down for about 5-10 seconds and your device should start rebooting.
I will try but it only started since our most recent update
Some people are just noticing this after the latest update, however, I have always gotten multiple texts with this phone even before the latest OTA. It doesn't happen every time but once in awhile a text will come in twice. I'm not sure it was caused by this update.
My fiance and I both use the Maxx...that being said, she's stayed with the official OS, and since the .181 upgrade she's been getting a ton of duplicate texts, almost every one. She just uses the stock SMS app
I did the ICS leak and I've been having no issues.
Making me think that it is an OS issue, but I'm not sure.