I had the same issue. The work around is to double major in a second degree RELATED to aviation which will be 100 percent covered. Yes, you can do this - ask the VA rep. I picked a business degree because I said I wanted to "go into the aviation business." This allows you to reach the 12 credits you need by taking business courses. Any second degree would work if you can justify it... biology and aviation = Wildlife Biologist dumping fish in lakes from an airplane. Geology and aviation = Aerial Surveying. Engineering and aviation = Flight Test pilot. Computer Science and aviation = Working for Garmin as a programmer for aviation GPS software integration. Criminal justice and aviation = Sheriffs Pilot. That will also help you when you pursue that non-aviation degree later (for those that don't have it).

If the VA rep doesn't believe you, show them:
https://www.usajobs.gov/GetJob/ViewDetails/417230900

TIP: Take as much online classes as you can, have your flight lab done "on-campus". This allows you to get full BAH and prevents scheduling conflicts. Greater flexibility in training, like flying at night or cross-country and not worrying about coming back for class.