either it's the interpolation, not being able to pose characters because the affect of the dials changes based on other dials, or the layers not shortening, or i don't even know please help, i have no idea what i'm doing!

Poser is a program that lets you manipulate human figure models in semi lifelike ways.
Yes, multiple dials can Stack on top of each other. You can apply the Height and heavy full body morphs, for example, and they both affect the model at the same time.

With regard to posing, (by which I mean placing the figure in specific positions, i.e. sitting, running, jumping, falling... ) the various body parts are pretty much restricted to bend, twist and side to side. If you have IK (Inverse Kinematics) turned on, when you pull on the foot, the whole body moves. If you don't want this to happen you can turn off IK from the figure menu.

We host a number of poser tutorials that will help you figure Poser out. they are available here. https://www.renderosity.com/mod/tutorial_premium/?section_id=1&page_number=3

thanks for the kinematics tip, but ive watched pretty much ALL those tutorials, and they WERE helpful but i need to know how to deal with a system that is not intuitive, like the interpolation or the layers or any glitches i may have to work around, unless i missed one that explained this, i dont know how the heck this works

Commented in your "More rotation issues" thread.