Hi,
I've checked on your new link aquaplu but there is no categories listing on the main area on the link you provided, and even if I go on a category listing like this one:
monosnap.com/file/MyKmse80jes4gcbDxwKWFg7FCkmj0S
As you can see there, the categories listing itself displays fine.
Your problem seems to be with the products listing and thus, the fix we added for the categories listing doesn't have any influence on the problem, and whatever the build, it's normal that it doesn't change anything for you.
For your products listing, as Jerome said, it seems that the consitency height javascript doesn't work on your website. While no error appear, I suppose that if you switch to protostar, it should work properly.
So I would recommend to simply force the height in CSS by adding such CSS:
.hkc-md-4 {
height: 350px;
}