you can see her leafs are yellow on the edges. Thats nute burn.
and no they arent really small.
you will see them blow up in the next two weeks. they are short so I assume they are getting enough light which equals fast bushy growth. You look like your on the right path. also I would find a medium between what your feeding the bigger plant and the others. Just me.

Good luck man.

Oh yeah and Bigger pots is for sure a god idea.