Possible solution
We were closing ours once as our neighbor was opening hers - did something to the program and for the next 3 days until we figured it out, every time they opened or closed theirs ours went up or down. The garage door co. emailed the manual and we had to reset the code. Wasn't all that easy, had to call them back and do it with them on the phone.
Forgot to say that our neighbor was driving past our driveway, not yet to hers.
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