Text message threads

[iamkevint]

Ok I've had my ET4g for a couple of months now coming from a Pre and I'm curious as to why I have two separate txt threads going for the same person. I'm rooted and running Calkulins 2.8.1 ROM. I'm also running GO SMS but it doesn't matter which messaging app I use, I still have two separate threads for the same contact. The phone number is the same in the address book and I'll text them and sometimes it will respond back with a separate message than the one I originally sent. Any one have any ideas about this or has this happened to anyone else? Haha I wish there was a way to merge threads as I have almost 1000 msgs on one.