Hello,
1) Check how the default Filter Products by Price widget and ‘Sort by’ option work with a default WooCommerce theme (Storefront). If the problem is independent of the theme, it means there is a problem with your imported products.
2) About ‘Incorrect Apache directives inside .htaccess file’, I would recommend you to contact your hosting provider.
3) About colors on ‘suspender belts’ category page – go to Products > Attributes > Colour > click on Pink products – http://prntscr.com/r6v9lc , you will see a list of products none of them has suspender belts category http://prntscr.com/r6va4q , so pink color can’t be shown in the sidebar filter for this category.
About “Light Blue” – go to Products > Attributes > Colour > and check http://prntscr.com/r6vbk7 I am not sure why you have products on the live site, but on the staging “Light Blue” is empty. Maybe import was done incorrectly or this attribute was removed from products. You can open settings of “Sheer Blue Stockings in Regular or Plus Sizes” product and check attributes http://prntscr.com/r6ve3v > http://prntscr.com/r6ve8o
We did not edit your products.
Regards