just looked in my 23SS and it's not tilted like yours. it's straight vertical.
it has the black roller at the top, which the slide bottom rides on and it's bolted to the floor. i'm assuming it screwed into the frame.
it doesn't look like it's supposed to tilt back when extending the slideout.
it is an adjustable support post.
i can probably take a pic of mine if you want and i'll post it.
the slide is in and it's raining pretty hard. don't know if you want me to see if it moves when deploying the slide. i can't do it since i'm alone right now but i might be able to do it in a couple of days.
we don't have to worry about snow here.
and Zoe the Wonder Dog(R.I.P.)
'07 Roo 23SS pushing an '07 Chevy Avalanche
Equalizer WDH and Prodigy BC