You're welcome. To do what you want you will have to custom-craft the xpath to select the correct item from the FormData repeater. This is because you are in the Main datasource repeating context and so when you bind the other node it has no information on how to pick up the FormData secondary datasource repeater information and render it. I haven't tried this but I think it should be possible with a simple XPATH that tries to match the current context position() with the FormData context position. Essentially you have to consider that you're doing an XPATH query into the secondary datasource.
Thanks and best wishes.
Shiraz Cupala / Microsoft InfoPath MVPQdabra® Software / Streamline data gathering to turn process into knowledge