After an upgrade back in September/October... I started receiving the same text message multiple times. It doesn't happen every time. For example, my Husband responds with "OK" and I receive the same message 5 times over a period of 4-5 hours.
Welcome ... SEARCH is your friend in this forum as most issues have already been reported. I did a quick search on "Multiple" and this popped up:
http://community.vzw.com/t5/DROID-X-by-Motorola/Receiving-multiple-duplicate-text-messages-since-latest-update/m-p/685893#M31790
There may be others as well.