My clients site https://marcoimports.co.nz/cartsearch/index.html when searching using the red "Search" button from the menu [2nd tab from left] and then selecting say EURO parts, the deselecting that to rebove all the ticks and re ticking DRIVE train, 25 products are presented.

However when using the Europarts Menu Tab, 6th from left. then selecting DRIVE TRAIN and only 22 products are presented..  This inconsistency happems with any of the selected serach items.., the 6th from left TAB Always retuens a lower number of products..

Appreciate comments, especially leading to a solution..  Thanks