Image Carousel affects image sizes on grid layout pages

I’m a building a Web side using a copy of the Goran theme which I have tweaked to my own need. The theme features a grid layout where child pages are shown with a featured image thumbnail. Originally, these images were square and quite large, so I have tried to make them more landscape-like to make the parent pages more compact (not all people like scrollong too much).

However, for some reasons the thumbnails shows up with varying sizes, which I dont like: See screenshot.

Judging by the html source it occurs that the image carousel for some reason has something to do with it, as some of the thumbnails take the source from the image carousel cache, and others don’t.

So if I deactivate Image Carousel, I get what I want. See screenshot.

But then I don’t get the image carousels on other pages. And it is no good deactivating Image carousel on just the parent pages.

This is really puzzling. Any idea what’s going on anyone?

The page I need help with: [log in to see the link]