Yea, your Polish roo is a mix, of what I don't know. As for your frizzle, she was molting when you got her and frizzles always look worse when they molt.
Don't worry, your Polish is a Polish.
I really would contact whomever you got your "silkie" eggs from and tell him what your birds look like. There is no way that they are pure Silkie.
They may have come out of a Silkie pen, but they are not Silkie feathered. Silkies don't get hard feathers, except on their feet. Their feathers should look "shredded" on the ends, whereas yours are regular hard feathers that most other birds get. Maybe he had a rogue rooster get in with the...