Who I have the same questioned this topic

I have a new iPhone 7, and I receive phone calls just fine. But I also get random ringing, sometimes 6-7 times a day, when no one is calling me. My ringtone is "Playtime," but the "phantom" ringtone is "Night Owl" Has anyone else experienced this problem? I went to the Verizon store, but the kid working there just looked at me like I was crazy. I'm not! I have several witnesses who have seen/ heard this happen!

I suspect this has something to do with my husband's and my phones being on the same account? But I have no idea how to fix it. Help?