When I click on an item in a layer to identify it, only one attribute shows up in the Pop Up window!
I have checked all the Properties I can think of, tried New Data Frames and New Projects, saving .mxd in an updated version of ArcGIS....nothing changes!!
I can't remember doing anything with the layers that would change anything, although I VERY highly doubt that I did.
I have never had this happen in my Life.
I will check with others at my office to see if this is internal but I have a feeling its not.