To start this is involving just the droid phone using the default applications built into it. I'm not using any 3rd party applications.
I have two e-mails I have synced to my phone through Exchange - my regular account and IT Help. Out of the blue some time after I added both accounts I saw that the IT Help account had Calendar syncing to the Corporate Calendar application. The two accounts were set up the exact same way. The only difference I can find is that the IT Help account has two mobile devices connected - android and motoandroid. My primary e-mail only has android.
So far my google-fu has not been too helpful and i'm very curious as to how this happened. Anyone have any suggestions?