It could be that the 2 indicates direction but I’m not really sure cause some of those numbers went up and down.
If they used a 3 for westward motion, then you would see that change, too.
But the longitude numbers themselves tell whether the track is easterly or westerly so there would be no need to use some other number out front.
Have a good night.
I’m going to TRY to get to bed and try to get some sleep.
Night MetMom.