Describe the bug, attach relevant log files, and describe what environment the issue occurs in

Using as part of the BCG modpack: https://www.curseforge.com/minecraft/modpacks/bcgnc

Installed version of mod is: 1.1.12+1.20.1+Fabric

Repro steps:
Open EMI Config
Go to Left Sidebar
Set the Align value to Left and Bottom

Expected results:
Left sidebar is now aligned to the bottom of the screen

Actual results:
Left sidebar remains aligned to the top of the screen

Please provide screenshots of your config and the effects in game

You have your sidebar side to 100 rows. If you enabled a background, you'd be able to see that the sidebar is aligned to the bottom of the screen. If you want your header lower, you need to have fewer rows.