[santod]

My impression so far, is that VZW has no roaming, "technically". So any network it can connect on, it will if they have a partnership with their towers. In my area, Verizon uses U.S. Cellular towers when needed, or closer to them then Verizons. If I use the stock flashed rom settings or the ons you provide, it detects all other towers as extended network, causing the popup, even though data still works.

However by switching to Home only, it now sees all towers that it has permission to connect through, as Verizon network!

Anyway, I'm just glad I don't have to deal with the stupid popups anymore!
I'm also happy that your adjustments are working for you. Maybe it will work for someone else too! Not for me though.