Keeping my very first few phals alive

[Shyulace]

Hey everyone! I've been reading through several websites and forums for the last few days to get a decent understanding of the needs of orchids and Phals in specific. I took a liking to this particular forum for the friendly and knowledgeable members and decided to make my first post here (Woo!).

I have two situations that I seek advice for. I think I know what I should do but a second set of opinions would be very welcome. I also want to apologize if this gets long winded :P

First: (This is before any research was done on orchids) It was the weekend before Valentines day and I stumbled upon a few stores in the city selling mostly orchids. I picked out a nice looking purple orchid with two branches emerging from the spike for my girlfriend.
They moved it from a standard 6" pot (I'm generalizing on the size) into a SOLID GLASS vase/pot (Dimensions: 12"D, 4-5"H). I was semi worried about the drainage but I didn't make a huff about it at the time. For the medium they put about 1" of bark on the bottom and packed some green moss everywhere else around the orchid roots (not sure how loosely though). It looked really nice and gave it to my girlfriend.

However, seeing that we both like orchids, we do not want it to die. I now know that, drainage/aeration are really important, and worried that because its a solid glass vase, its probably getting very little air and I'm now somewhat concerned with root rot. In addition, the pot apparently is too large.
My question is that, must it be moved asap into a different potting medium and pot? Or can I wait until the bloom finishes and repot it.
(I unfortunately do not have any pictures handy)

Second: Since I guess the sensation of growing orchids are addicting (haha duh look where I am posting), I wanted one of my own. As I was passing by my local homedepot for other supplies I saw they were selling other orchids alot cheaper than what I got for my GF. I grabbed one happily and brought it home.
To my surprise, in my oblivious haste I grabbed a pot with two Phals in it. When I checked the pot (probably 6"), it seemed very full, with several semi dried aerial roots hanging on the side.
I was wondering if I should separate them immediately, or wait until their bloom finishes. I'm pretty sure I will destroy several roots in the process of separating thus ending the flowering spike. But seeing how uncomfortably tight these are in the pot, I wasn't sure if it would die in there.

Any input is welcome, and sorry for the long read haha.
P.S.- I'm not sure what kind of Phalaenopsis they are. They were labeled as hybrids.