Maybe it has something to do with the way your SEO mod outputs the URL? I notice on the product page it is like
.jhelectronics.com/exrs-digital-2way-radio-with-fhss-p-52912.html (no categories specified) while the product listing page has
.jhelectronics.com/way-radios-exrs-radios-amp-accessories-c-1_22_266.html

Obviously one would need to understand how that SEO mod works and interfaces with ZC core to know if this has a bearing.