Same problem here -- I'd really like to use ctrl-n to move down. This works correctly in the results list *unless* the list item is an application, in which case it triggers the "Show Package Contents". In other words, I can navigate up and down with ctrl-n and ctrl-p through files, folders, web hits, contacts, whatever, until I hit an application. (Ctrl-p still works on the application.)
This doesn't happen in Finder (I can move up or down as expected, since I've mapped the key with Karabiner). There doesn't seem to be anything about "Show Package Contents" in Keyboard->Shortcuts.
Is there a way to check the Alfred hotkeys (without looking through every workflow, of which I have many)?