Computed virtual column of computed actual column in sheet

[Tom_automated]

I have a couple of manually computed columns in my Google sheet. Full Name and Address combining columns for first and last name & street, city, zip. When I regenerate the table, AppSheet adds 2 virtual columns _ComputedFullName and _ComputedAddress. Why exactly is it necessary for it to do this? Why can’t it just use the manually computed columns (computed in Google Sheets) instead? Is it an efficiency thing or what? I’m just curious, because I apparently like to poke things that I didn’t make.