Hi,
You should put large amount of products inside the module to use the carousel efficiently. I don't know, put 15-20 or even 30 products inside the module. This is why we need the "Carousel" extension, right? Otherwise, we won't need those NEXt-PREV button.
If you have only 3-4 products to show in the module, then you should use the official "VM - Product Module", which doesn't have any NEXT-PREV scrolling features.
But this is a bug of our module, even though there is less products, there shouldn't be any "white space". But this module will be updated this week and the problem you are reporting is one of the bugs that will be fixed.
Regards.
Support & Development.