I'm using a K2 module to display the K2 items on my website; however, K2 is creating multiple links for each category when there should only be one link.

hiddenneedle.com/component/k2/itemlist/category/2-film
hiddenneedle.com/film

hiddenneedle.com/component/k2/itemlist/category/7-fashion
hiddenneedle.com/fashion

How can I correct this so that the link with "itemlist"i s no longer active?

This is a common problem with K2. As long as it isn't fixed by the K2 devs, you can circumvent it with an SEO extension.

Thanks for the reply Matt. I have very limited knowledge when it comes to this type of stuff. Could you recommend a good SEO extension I could use to disable the multiple K2 links?

take a look here getk2.org/documentation/tips-a-tricks/item/1106-hack-to-avoid-duplicate-urls