DWP

Does anyone else have random contacts showing up in their Most Contacted list?
I recently refreshed my phone and did a clean install of DWP. I've been using it for about a week and I've noticed that there are a couple of contacts in my most contacted list that I haven't contacted in years. I checked the stats for those contacts and it's everything is zero for Outgoing, Incoming, Missed, and All in calls and texts.
I'm assuming these contacts will get pushed out the more I use DWP, but I just wanted to see if anyone else had the same issue.

Hello
If you send email or other actions to him, will lead to display it in Most Contacted. A contact number of tags in the database. Any program may modify it.

That is concerning. Both of these contacts I have not contacted in any form for several years. Does that mean there is an app on my phone that is reaching out to my contacts without my knowledge? Is there a log or any way to figure out which app is performing these actions?

Sorry, there are no logs.