I am having a big problem with my binding in infopath 2010. I am a student who is on placement and has been given a project to create a software request form for a large organisation.
To get to the point the end user has to select a campus they are based on and then the room within that campus. When they select the campus the capus automatically appears in the room number dropdown then, like so:


The room number drop down still only displays the rooms in that campus which I want it to do but when I select a room number it rewrites the campus drop down to that room number, like so:


I have found some threads on this forum saying that its to do with repeating feilds but no one actually says how to correct the problem and because I am very new to infopath I dont understand the termonology.
If anyone can help I would greatly appreciate it because I have to demonstrate this in a weeks time to my managers for approval and would prefer it working correctly as this is the only problem I am currently having.
Thanks Very Much.
Scott