Moonslayer really hit all the info there. I'll just add that sometimes a morph has more than one name for what is in essence the same morph.

Blonde pastel is a particular type of pastel, but it's still a pastel.

Also, lesser platinum is a single morph even though it has a two word name... although most hobbiests refer to the morph as a lesser. Then when you combine lesser with another morph like pastel, it would be called a lesser pastel, but it doesn't mean the pastel is "less" of a pastel, just that the other morph is called a "lesser".

So things can be confusing, even for experienced people, when new morphs pop up to also be combined into old morphs.

BP.net is really great at answering questions and especially for giving you the information to do research so you can understand how it all works.