There are hundreds of people in my phone which are not listed from the link in the post, I only see people on my friends list who have their Facebook phone numb

There are hundreds of people in my phone which are not listed from the link in the post, I only see people on my friends list who have their Facebook phone numbers shared there currently, or did at one time when it was imported into my phone book. Sounds more likely at one time your wife had her phone number pushed to / listed on Facebook and it was synced to your phone before she removed it.