I don't know what you are seeing, but everything looks completely normal to me, and yes, the whitish/silvery fuzz under the leaves is normal too.
They do look very green though and I am not sure if they need as much nutrients as what you are giving them at this stage.
Also, I would say there are signs of phosphorous excess and not phosphorous deficiency.
Definitely no signs of insect attack or fungal problems.
Hope this helps,...........
Organoman.