The reason why the 'Ratchet Binder with Port-A-Ring' pops up in the results, is because the tags contain the 'd ring' part and the content of the product has the word 'strap' in it. It's sort of a fuzzy match.
The best possible solution to this in my honest opinion would be simply not to index the product content (and maybe excerpts as well). From the looks of it, it's mostly non technical, less relevant description. That would definitely solve this issue. To do that, just turn off this option, and make sure to Re-create the index table: https://i.imgur.com/ZhlxL07.png
There is only two ordering criteria available, primary and secondary. The reason is mainly that it greatly affects the peformance, so the options there are very limited. You can however still do SKU as primary and Title as secondary: https://i.imgur.com/n7lmUt2.png
The pagination looks okay to me, I see 18 results on the second page header as well: https://i.imgur.com/bb8v0jn.png
It might have been only a browser cache thing, I'm note sure.
If you like my products, don't forget to rate them on codecanyon :)