What you've shown in your original post is a stepper with a Single-Step Reset which means that when it's working properly the reset solenoid takes the gear just one step back, similar to a credit/replay unit for example. If you look at the Full-Reset steppers in the parts catalog you'll see that they don't have the flat Escapement pawl you refer to. Does your stepper successfully take one step back?
Either way there is a disconnect here somewhere. Either that stepper is intended to step back only one step at a time, or somehow an Escapement pawl was incorrectly added to the stepper at some point.