About spools - According to the manufacturer the silk thread used on cards and spools is the same exact thread, but there are a few differences: No creases on the thread on spools, whereas the silk on cards has fold marks. The thread on the spools feels just a tad thinner and smoother than the thread on the cards. It might be due to the spooling process compressing the thread.
About colors - Color can vary between dye lots. While every attempt was made to reproduce thread colors accurately, colors on your monitor may not precisely match actual thread colors.
About shopping cart - Quantities are automatically set at 1 when you add items to the shopping cart. To change quantities, just change the number in the shopping cart window to quantity desired and update the cart.