Oh boy. Something seriously borked with sync settings in AE.
Keyboard shortcuts and Comp presets, etc not syncing between two fresh installs Looking at the Preferences Folder in User>Library>Prefs>Adobe>AE>23.5
Customised Keyboard shortcut are normally saved in >aeks Folder as the Custom_Name.txt. But when you sync, adobe throws all the users shortcuts in to the Root Level of the version Prefs folder and appends ".txt.txt"