Delayed or Duplicate Text Messages

[shoe3627]

For about the last three week I have had several recipients of text messages from me that complain they are getting the same message from me over and over, or that they get them 8 hours later.  This is only happening when I text to an area code outside of mine?   My phone is the Motorola RazrMaxx CE0168.  I have cleared my cashe turned the phone on and off, not sure what else to do?  Any help...please!!!