Wrong product category showing

Hi support,

For our website, dekeepershandschoenenshop.nl we use WooCommerce. At this moment, we import all our products, but in the full overview with products, the category is not showed correctly for some products.

On this page (see image 1) you can see the first two products show the tag ‘Elite Sport’.

This is correct, because this is the brand name and the ‘primair’ category (see image 2) that we select. We have done this for all our product.
However, for several products you see an other tag, e.g. ‘aqua’, while we did not select this as ‘primair’. Furthermore, for ‘RWLK’ all products show wrong tags (e.g. gras / flat instead of brand name RWLK).

How can we achieve that the brand name (Elite Sport / RWLK) is visible for all products?

URL image 1: https://ibb.co/ZGFRK8X
URL image 2: https://ibb.co/jrJ4WVg

We hope you can help us with this. Hope to hear from you soon. Thanks in advance.

Regards,
Casper