Serpentine Belt issue

[Engir]

I replaced the belt on my 4.0 87 XJ the belt I bought from amazon is below. Amazon says this is correct for my XJ but it is not the belt is not wide enough as you can see in the images below. The first two are the power steering pulley, the third is the Alternator, fourth is the harmonic balancer pulley, and the last shows the ridges on the belt to me the belt needs to be one more groove wider? Anyone know what is going on?

Amazon.com

 

[mark sr]

It's been a long time since I had an XJ but seems like the belt was always a tad narrower than the pulley.

 

[superj]

I would be fine running the belt on groove thinner

 

[Engir]

I would be fine running the belt on groove thinner

The problem is the belt is moving around on the pulleys and fraying the edges. This makes me think I need a wider belt. That is why I posted here wondering if anyone noticed this issue and what did they do to solve the issue.