Heck dude, I have been getting and sending double texts for years with Sprint. It actually cost me a relationship a whil;e back because the girl I was talking to got the same text I had sent the the night before, but this time we weren't talking. She thought I was being shady and accidently sent it to her. Earlier this year my current GF got a text from me after my phone rebooted it was from weeks before..bad deal..
If you look at the maps I bet that Orlando site that went live is bumping with LTE in that area..there is like 11 sites in that general area..Wish we had someone over there..