Paphiopedilum St. Swithin bud development questions.

[JustinJ]

Hello everyone here on The Orchid Board! Excited to learn more from all of you and maybe impart some knowledge myself, eventually.
I have a Paph. St. Swithin that is experiencing its first bloom. It is a single fan with 6 leaves, 7 if you include the leaf the inflorescence emerged from. I was m multifloral naive and am really just pretty excited it’s blooming at all.
My question(s) are: what is the best ppm nitrogen to fertilize with when the plant demonstrates it’s going to bloom?

This one is trying to make five buds but each successive one is smaller than the next. The last 2 are miniscule compared to the first. Would cutting off the last 2 buds divert the energy to better development of the prior buds?

Do the flowers continue to grow once they have opened or, once open, that is it?