dropping roughly 60% of my SMS messages

[sgtcody]

Hi all,
I have been having a problem where I don't receive more than half of the SMS messages that are sent to me. The ones I send all go alright. I have all my other data services. I have called CS at Sprint a couple of times but the problem persists. I have never had this problem before I switched to Sprint/TP from Helio/Ocean but this is my first smart phone in many years so maybe it's something to do with WM (or me); I dunno. I seem to get them all from Sprint users but it's spotty from other networks.
I'm using the latest version of Juggalo TP ROM and the stock radio.

I guess what I'm asking is: What are the most common reasons for dropping texts altogether? I am used to delays but not to just never getting them.
Oh... and before the wisecracks start, yes I do have friends and I have been sitting next to them when the send texts and I don't get them..