Motorola Admiral :: "Text Message Not Sent" When Trying To Send A Text?

When sending text messages, it seems as if I receive a message as I'm sending one, or, if I send multiple messages too quickly, one or more of my outgoing messages will fail, and I will get the message "Text Message Not Sent". If I do get the error message, the recipient may or may not receive the message. Often times I will have to Resend Message (by long pressing the failed message) multiple times for it to finally send. Afterward, I will get a message from the recipient that they got multiples of the same message from me, and I have to explain that it claimed it failed, and I just wanted to make sure they got it. Other times, they will NOT get multiple messages.

I've done a hard reset of my phone, and it made no difference, so I'm assuing that it will require some sort of update. Also, it does NOT happen in only one area (or tower), it happens regardless of my physical location, and regardless of signal strength.I can reproduce it by sending myself (creating a new message with my phone number in the TO field) multiple messages quickly. If I quickly send, say, 5 messages, each having a number (1, then 2, then 3, etc) in them, I will not get all of them. At least one will fail, often 2 or 3.