SMS and MMS combining

Help! I have SMS and MMS messages that are combining and sending to the last person I am sending one too.
For example: I sent a SMS to someone last night and then in the middle of the day today I was sending one to someone else. It combined about 1/2 of the message from last night (to a totally different person) with about 1/2 of the one I typed up and sent it. The messages look fine on my end but the person getting the message is getting two that are smashed together. It will also list the phone number to the person the other text was too.

This doesn't happen to every one or all the time. Normally happens when I am sending quite a few in a short amount of time.

Suggestions?? This is causing problems due to the fact that I use my personal phone for my business also.


Thank you in advance for any advise.

 

No it's not on iMessage. I also found out that sometimes it's is just combining two random text together and sending them....very frustrating.