I typed my last response in a hurry as I'm supposed to be studying for an exam... I'll get back to that in short bit
You can try opening ActiveSyn on your Touch Pro then hitting Menu -> Configure Server and tap next until you get to the "Edit Server Settings" screen. Check that your settings there are as you'd like. Then hit Menu->Advanced and check what your device is set to do about conflicts and the like.
See if anything in there helps.
If not, you can always delete the exchange partnership on your device and set it up again and see if that clear it up.