@setordesign100 Agree with iamteejay in that having screenshots would help or a video might help. Being unable to change the height of the layers (I think you might be referring to the sections) could be due to a minimum/max height ; as for being unable to move elements inside them, it could be there are margins preventing it from moving. https://support.wix.com/en/article/editor-x-docking-and-positioning-elements
You can also reach out to customer support from the relevant account and they can take a look if you think there is an issue.