Good catch Erick. Hopefully it really was a mistake, and not an intentional "hope he doesn't notice" move.
I remember I used to always, every month, get charged on my phone bill for one "3 way call". I never used to read the bill because I had unlimited long distance we would just pay it. One day, I was bored and was reading the bill and noticed the charge. I went back and looked and this charge was on each bill for many months before !!!!! Just one 3 way call, each month. My wife and I don't even know how to do a 3 way call. They told me it was probably happening because someone would make a call, hang up, and dial a number right away. This was a bogus excuse, and then I realized that: if this was done to everyone's bill, and if only 50% of the people noticed it, they were making a killing !!!!!!!!
Originally, they said there was no way to put a block on 3 way calls. After it started happening again, and I got a little irrate, they were suddenly able to block the 3 way feature
Sincerely, Clayton