Split text messages problem

I have experienced this problem when receiving text messages
from my husband, and only from him. We both have Stratosphere phones. Sometimes
I will receive a message from him that are bits and pieces of messages that are
jumbled up, make no sense and may be taken from several previous text messages
from various individuals. We have compared messages that he has sent and I
received, and they are totally different. This is very confusing. It only
happens to some, but not all messages that my husband sends to either me, or to
his friend. I'm thinking it's either a glitch with his phone, or an update to
his phone that may perhaps be causing the problem. Any suggestion other than
replacing the phone?