Can anyone help me figure out this button issue?

On my products with a few of my themes, the buttons to adjust the quantity of products purchased has 2 SETS of buttons!

Example, if you go to add 2 of these to the cart additionally, you will see the extra buttons. How do I remove these?

https://www.pclane.com/shop/software/windows-7-home-premium-64-bit-full-version/

Thanks in advance.