Shaping Dendrobiums (and other orchids) as They Grow

[paphlovian]

Hello!

I am curious what methods are used to shape orchids as they grow. For example: I have a dendrobium that has a new stalk (since I purchased the plant) that's quite large, but it doesn't have the lovely curve upwards that dendrobiums have when store-bought. How do they do it!? My new stalk grows out to the side, when store-bought orchids curve gracefully up. What's the deal? (I'm new to this!).

Also, I have a phalenopsis whose top leaf would colapse in between waterings as it grew larger and would expand after waterings. Now that it's even larger, it has remained colapsed and flopped forward. I believe the plant is moist enough, so I'm not sure what I'm doing wrong.

Thank you for all your help!