Two tracks?

A quick learner from Sliding glass door accessories says:
July 11, 2022
Please let me know which of these two tracks my Viking sliding glass door should be riding on. The door can be made to ride on either one, but the one on the right in the photo is the only one that was originally rounded in profile. The one on the left was originally more squared off in profile (as you can see toward the end that track), but has apparently rounded off over time with the door riding on it. The door seems to move equally well on either track. I ask the question because I want to install a track cover and new rollers and want to make sure that I install them and the door correctly.
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Dave Sr. from SWISCO responded:
July 18, 2022

I would think that your door should be rolling on the rounded track you show here. Follow the track to the jamb side of the door to see if the rounded track lines up with the patio door pocket that the door goes into at the jamb. 

For now, take a look at the 80-106 replacement track installation video. This video shows how the track should line up with the door pocket in the jamb of the door and will hopefully give you a little more insight on what you have to look for.
6' Sliding Door Track Cover, Small
6' Sliding Door Track Cover, Small
80-102
$11.30
6' Sliding Glass Door Track
6' Sliding Glass Door Track
80-106
$32.20
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