the reason for this behaviour heavily depends on the theme you're using, whether it was modified, etc. It would be great if you can share your shop address (or put it in your forum profile) and storefront (not admin) password, if you have one enabled for your shop.
As noted above, this is something that the forum members would need to see live.
If you don't want to share the link at least consider posting the errors that you're seeing in the browser debug console (assuming there are any).
Thank you for your replies! There arent any errors being shown. My shop address is tarp-trader.myshopify.com I have noticed that when I choose a variant to add to cart it will usually add the very first variant. However, if you choose another variant and hit refresh it will add the variant chosen. It will keep adding that variant from then on out no matter which additional variant is chosen.
Can be a pretty ambiguous error and hard to diagnose without examination, but since you provided the url I took a quick look
the error is from here
formSelector: '#AddToCartForm--' 4394641784877,
formSelector: '#AddToCartForm--' + 4394641784877,
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