This is my confused face

I'm back in training again this week and the majority of the next two. (Send help) I was walking over to the cafeteria to get some lunch and got stuck behind two twitterheads. I may have indulged in a little stereotyping when I checked out their clothes, hair styles, and what I could hear of their conversation to come up with the designation, but it seemed appropriate.

They seemed the standard just-out-of-sorority type who get hired for the jobs that deal with being nice to people and representing the company in public. That is, until I looked at their shoes.

The girl on the left had one red shoe and one black shoe. Similar style, but very different. Confused, I looked at the girl on the right. Her shoes matched each other and were not at all similar to what Left Girl was wearing. I have no idea what was going on.