Filter Feature on Front end of 2.3.0.2 Don't work together

https://www.skydivingcanada.ca/skydivin ... ilter=19,5

Hi Guys
In this filter only the Valkyrie by Performance Designs should remain
but instead it only applies the first filter which is Manufacturer.
It skips over the skill level filter.

Thank you for helping me solve this

Found a Free solution

https://www.opencart.com/index.php?rout ... load_id=47

Thank you