Weird double "Supermoon" time lapse on iPhone

After my marginal success getting a screenshot of the moon from a time lapse video, I wanted to try the technique on the supermoon from May 5, 2012. I took this shot out the same window as the last time lapse, and got a slightly different effect.

A weird double supermoon created with glare through a window

It appears that the extremely bright supermoon created a glare on the window, producing a double supermoon. Luckily, at least one of the moons has some detail to the face, which means I was able to reproduce the technique. Hmmm...

Rise of the supermoon

There are some things going on with the reflection through the window that I don't quite understand.