Good afternoon. Thank you for taking the time to post your comments on our flooring. We are sorry to hear that you are having issues with your flooring. The color variation is something that is quite common with vinyl flooring products, this is why we recommend opening multiple cartons when installing the flooring. This will allow you to blend the various colors together. When it comes to chairs with wheels we recommend you use a floor protector in areas where the chairs are. Caster wheels can cause a great deal of damage to a floor and are not recommended. If casters are used we recommend wide double wheel casters made from plastic to lessen the impact on the flooring. Again I do apologize for any inconvenience. Have a great day.