Hi-Tech Leather Splitter Problem

[TomG]

I need some expert help here. 

I have the Tandy High Tech Leather Splitter and it has been great for years. 

Today, I needed to split a 3" wide 20" long strap of 8 oz down to 6 oz for a repeat job.  I had used it to do this a few weeks ago.

I have noticed it dragging just a tad, so I took off the blade to strop it. As I was putting it back on, I noticed one of the roller posts not touching the side adjustment screw.  So, I loosened the nut and turned it in until it just touched and secured it.

Now, it is splitting fine for a very short bit and then shearing through the strap an an angle. Repeatedly.

I moved it back out but it's still doing it.

Stupidly, maybe, I tried to adjust them both so that the roller posts are equal distances in.  I've started with the blade edge just past the center of the roller and worked it out until it's just before the center.

I'm at my wit's end.  I have to get this job out.

Any clues?

Thanks