No kidding, that is weird. Thanks for the screenshots, that does clarify what's going on. It's like the Phone app is siphoning information you never wanted from the Maps app.
Check out the last post (by Hopeful Traveller) in this thread, maybe it'll help?
Can't block caller iOS 10 iPhone 7
Unfortuately I have no other ideas. If you have an Apple device on warranty/AppleCare, take advantage of a free call to Apple and see what they say.