Hello Toufiq:
So, I think I was able to fix the top being cut off, but I'm having an issue now with having these little white bars on the sides of the SP Page Builder Pages with in the articles for J2 Store.
I really need to have the pages for products function like the normal SP PageBuilder pages, but for some reason that isn't integrated well from what I can tell.
I have tried to attach photos to this response, but I think it would be best if you used my login details to access the page live so that you can see exactly what I'm referring to.
Take care,