Oh, Okay!!! I get it now. LOL. Yeah, it is pretty common for a horse that is jogging slow to not track up like that because they aren't moving out as much as a horse in a long trot. Their strides are shorter and therefore will not be as "under" as the longer strides. If you watch any horse that has a slow western jog, they don't track up so it's not really something to concern yourself with.

So long as she isn't pulling herself along with her front end (which I bet she isn't) then you have no problem and are doing exactly what you need to do.
BTW: I would love to see some video of her new and improved jog. I am so happy that I could help a little. :)