First- I an not familiar with the Winnebago/Lippert system. The Lippert in Wall system MAY be the same as the Schwintek system. This video may help you to re-time the slideout.
To keep the slideout synchronized they recommend holding the extend or retract switch for about 5 seconds after the slide is fully extended or retracted, and to not stop the slide part way out. The motors are not connected together and the controller counts the revolutions. Hope this is your system and helps..
Lippert has several videos on the slideout operation.