Subject says hour behind, but the text says minute ahead. The text implies the non-connected clocks are in sync with each other, which is curious since connectivity is usually how time syncing would occur. In my experience, non-connected clocks slowly drift over time, and not all at the same rate.

This makes little sense to me.

I'm sorry, I wrote the wrong thing in the title. The fact that the non-connected clocks seemed to drift at the same rate is the reason I noticed it. But really I think it's just a coincidence or something.