2 questions on fixing a mezuza:
I am wondering what is the custom concerning placing a Mezuza on a gate (or door etc..) when it is placed on the outside of the door and not within the Oivei Hapesach (since it is very thin). The Pischei Teshuva in Yoreh Deah 290:10 writes that the bottom of the mezzuza should be alachson pointed towards the door while the outer part should be going pointed away from the door. Is this the accepted practice, I have seen by many that in this case the exact opposite, (i.e. the top is pointed towards the door and the bottom pointing away from the door)?
2) In a bedroom (which has windows) and the only door the heker tzir opens out from the room. Should the mezuza be placed as walking into the room (against the heker tzir) or following the heker tzir (from the inside of the room going out)? Possibly in this case minhag chabad is to follow heker tzir, while others go by the conventional way to enter the room from the outside?
If a Rabbi (non Sofer/ Magiah) who occasionally checks mezuzas and is not a mumcha (I can tell by obvious kosher scenarios where he says they are posul for geniza, or he circles with pencil on top of the letters), would it be lashon harah for me to say that they are kosher to use or better to remain quiet. I ask this because a family gave me 4 mezuzas for geniza (from this Rabbi non sofer) and they were fine, at most a shaylos tinok for 3 of them.