Ahhhh... okay... the remaining buds actually look fine to me. The ones on the end of the stalk always take the longest to develop, and are the last to open. Question about the open nodes below your buds. Those are from the buds that blasted, right? And not from a previous blooming? The reason I ask is because if they are from a previous blooming, you would have wanted to snip the stalk below the open nodes to encourage a new inflorescence to form. But if they are the blasted buds from this current new spike, then I would continue on as normal.

The buds on the ends of the stalk are always the very last to plump up and bloom, and they can often look sort of "jammed together" as you wait for them to grow. I would recommend increased watering and giving the plant more sun if you can supply it. That should kick-start your phal into growing some nice plump buds. Just increase the light slowly... you can slowly inch it toward that lovely sunny, high humidity window of yours! But definitely, DEFINITELY keep it away from the heater if you possibly can. Heaters dry the air terribly and just bake the moisture right out of the pots.

I can't tell what kind of pot your flower is in, but you can always stick it inside a larger pot to help hold humidity. And again, give it lots of water, too.

Finally, if the buds at the end of this stalk just sit there and don't do ANYTHING for ages, instead of re-potting, snip your stalk right below the last open node (where your bottom bud was). This will encourage the plant to make a new inflorescence from a lower node, and once that starts, you can take extra care to provide more humidity and light, and you should get a nice spray of flowers. I've been known to do that if one of my plants somehow ends up with 2 measly buds at the end... instead of just getting two buds, I snip the stalk below the blasted buds, and it will shoot out a whole new glorious inflorescence! Then I'll have 10 flowers instead of 2!

Hope that was helpful! Make sure you post pics when your buds open!!