The manual states if you only partially extend and/or retract the slides, the motors can get out of sync. It also says to amp-out the motors on a retract or extend. This supposedly syncs the motors. Amping-out means hearing the high-pitched whine from the motors when the slide stops (in or out), then hold the button and extra 3-5 seconds.
You can see this at work. My motor module is under the master bed. If you watch it and follow the manual's instructions, you can see the associated lights blink during the process.
I'm just paraphrasing the manual. Don't shoot the messenger.
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