You have set these up incorrectly ...
Currently, you have 1 Option Name and 1 Option Value for each of the Option Names ...
This will result in dropdowns appearing as Radiobuttons and as Radiobuttons they will be selected ...
What you want would be 1 Option Name with multiple Option Values ...
Example:
Option Name: Size
This would then have multiple Option Values for:
Small
Medium
Large
Now you will see the Option Name: Size and either 3 Radiobuttons for;
Small
Medium
Large
or ... you will see a Dropdown for Size and in the dropdown you will see:
Small
Medium
Large
You may wish to search the Tutorials/FAQ for:
Attribute
Option Name
Option Value
for additional information on them ...
