Hey there
If I am following you right, then what you are trying to do is filter your owner(s) names depending on which Project is selcted from a dropdown box?
If this is the case, I assume you have your sharepoint list with this sort of setup:
Project Owner
Project 1 Owner 1
Project 1 Owner 2
Project 2 Owner 3
Project 4 Owner 4
Project 4 Owner 5
So again If I am following right you have your data connection to your list and when you select, say Project 2 (which you would expect to get "Owner 3" to appear, you are instead getting Owner 1.
Is this about right?
Let's say you picked project 1 or project , what you would then want is anotyher drop down box with just those 2 owners in to select from?
If this is the case, then what you need to do is do an XML filtering by using the GUID code.
It can be a bit daunting at first, but is actually pretty easy to do and I can provide the code and walkthrough
Give me a shout if this is what you want, as I don't want to waste your time if I am getting the wrong end of the stick
Regards
Ryan