There are some places in Therm where order of operations makes a difference. This is one of them. Import your DGU vision glass first, and then your monolithic spandrel after. This will set the vision as the 'main' glass and then Window will show you that glass information in the frame library.
For what it's worth, it shouldn't make a difference in frame u-factor or total product calcs either way. It seems like its just a visual thing.