RR window going up and down in 2" increments after regulator replacement

After replacing the regulator on the drivers side rear window of my 07 328i, the window moves about two inches when pressing the switch either up or down, then stops. When I press the switch again, it moves another two inches, then stops again. It continues this way all the way up and down. It isn't binding, making any noises, or giving any other signs of struggling, and it behaves this way whether I use the switch in the drivers door, or the one in the right rear door. And a warning light comes on for about a minute after starting the car with a yellow picture of a window. After a minute, the light goes off and stays off. It's as though it's stuck in some weird mode, but I don't understand how replacing the regulator could have caused this. I wonder if it went into this mode when the old regulator broke as a way to protect the motor from burning out. Any idea how to reset it? Thanks.

Edit: Correction to the title; I meant to say LR window, not RR.

RR window going up and down in 2" increments after regulator replacement