Strange Archer Queen behaviour

Why would the archer queen in this replay target the DE drill furthest away first? I have no idea.
http://youtu.be/XDkVQzj6bLc

Still got the de though...

But yeah, probably just a little bug or glitch in the AI.

I have seen similar things, so you aren't alone. No videos to prove, but just walking by an elixir collector to shoot at a cannon behind it - can't see how the cannon would have been prioritized over the collector by location. I have wondered about her a few times.