Sliding closet door parts

I have two sliding doors that are driving me crazy in a house I just purchased.

From you catalog I have confirmed that 23-024 and 23-025 are the correct hangers from measurements, and appearance; however, on my application, they are not technically hangers they are at the bottoms of the doors.

So, my first question is are these designed to be used on the bottom as well as the top?

And, what is the replacement track to be used if bottom mounting is ok. (Yes current track appears to need cleaning, but it appears to be slightly bent at the other end so replacement might be the easiest resolution.)

Here is a photo of the bottom track with a ruler for measurement (71" inches wide)

This is evidently a builder designed failure. The front door has 2-23-024 rollers, and the back door has 2-23-002 rollers. (Dealer probably had too many drinks at lunch and then installed the door.)

I'm going to try one thing and that is replace the front rollers with 23-024 and the back with 23-025 (want to get a bit more room between doors). And see how that works.

I have removed the bottom track, cleaned it, and re-installed and the doors do operated better. But do want to replace the rollers.

If that doesn't work; time to trim the door down and install overhead hangers like the other closet doors.

Thanks for all your help.