Check your settings. Is there an option for archived. I'm not sure because mine does not to that.
If it's a Droid X it probably does. Pull up a contact you've texted with...at the top of the screen (above the name) on the right hand side you will see 3 dots with one being red. If you swipe side ways you will see a page for social notifications one way and a page for text history the other way. It's in there. Need to figure out how to stop that.
Wow you are right! Glad you brought it to my attention. Could be consequences if left unchecked! They need to fix this! hopefully 2.2 will rectify the issue.