If you don't add the numbers for a campaign exactly like it says in the instructions, it will make the new number your default number. So, outgoing and incoming calls will all show to that new default number. If this is what you are experiencing, the fix is pretty simple. And actually, its easier to break it and fix it than it is to do it right from the start.
Click on the gear. go to phone numbers. Click the pencil by your main line. Change assign number to target - to reserve pool. Click save. Then reopen the number like you just did and change it back to the setting it was before, which was probably office. Click Save and all should be good.
