Hello there thecolbster91,
Thanks for posting here on the Apple Support Communities! This is a place where other Apple users can submit questions or respond to others to help lend a hand. Let's take a closer look as we do our best to provide some additional insight.
We understand you have two separate iPhones, however both ring when you get a call or message. To get started, are the messages always just iMessage, or does this happen with regular SMS messages? What is the difference between iMessage and SMS/MMS?
The reason we ask is this is only really possible if both phone numbers have been associated with the same Apple ID at one point.
Since you can sign into more than one Apple ID in a different place for different settings, be sure to go Settings > Messages > Send & Receive on both. Do you see the same Apple IDs and phone numbers for both devices here? We can check the same for FaceTime in the same way.
We hope this helps get you pointed in the right direction.
Take care.