Texting Issue

[iounothing]

I started having issues with texts going to the wrong contact about a week ago.  This occurs if I reply to a message or send a new message, and if I use the stock messaging app or Handcent.  The workaround listed on this forum of sending a text message directly through a 3rd party program (I use Handcent) rather than using the reply function has not solved the problem.

I obviously don't want to send personal messages to business contacts and vice versa.

Verizon - Any other suggestions?