Weird SMS problem.

[thebignewt]

My wife has an iPhone. About a week ago we started noticing that my txt weren't getting to her phone when I sent them. So last night I started sending 4 txts, and found that #4 would push #1 to her, #5 would push #2, etc. She shut hers off and on (no battery to pull) no change. I pulled my battery and all the txt showed up on her iPhone. The txt thread had about 80 on it. WUWT?