@ChabadShlucha,
“Id really love to know if SH was taught this sicha,and if yes, how he reconciles it with having no problem saying ztzal etc”
Firstly, I don’t use the loshon of Zatza”l, being that in Lubavitch we use Zy”a (Zchuso Yogein Oleinu) or Nishmoso Eden.
Secondly, the Rebbe would often use the loshon “Moshe Rabbeinu Olov HaSholom” and would use Zy”a for the Frierdiker Rebbe.