Here's some advice for when you're starting out with breeding.
You should not be culling as hard when you're just starting out. Right now you should focus on growing your flock, keeping ones that generally fit what you're looking for and then later when you have a larger flock, start culling...
3 and 4 are silked, yes. The rest are satins.
The blue chick is adorable :love
Out of curiosity, what color are your other silkies? Are you planning on keeping a mixed color flock or are there specific colors you're breeding for?
The ones that have silked feathers can't pass on satin feathers to any offspring. It doesn't matter if one or both of their parents were satins. Since smooth feathers are a dominant trait, it cannot be carried. In other words, if you kept the silked ones and bred them to your silkies there would...