Problem lies with how we classify these genes.
Here is how it supposed to work...
problem lies with genes such as spider that we have not seen the homozygous form, so it really can't be classified yet. We just throw them in the dominant classification, until we get more information. To get all spiders you would need a homozygous spider, but we haven't seen one yet. (read more about it here) That's why I feel these genes should be separated from genes we know are dominant, I call them unproven dominant. adding to the above table....
However to get all pastels, you need a super pastels (which is a homozygous pastel).