Is there a reason "sanctify" - all word forms, does not get sanctification?
"Match all word forms" is powered by an algorithm (not a dictionary), so sometimes it "understems" and doesn't group words that you think should have the same root.
See my previous posts for more information: https://community.logos.com/forums/p/87708/615401.aspx#615401 https://community.logos.com/forums/p/61695/437957.aspx#437957
Is sanctif considered a stem?
In its own right, it is not a word, so use it in a Search with "Match all word forms"!
Sanctify will only give you forms with the "y" like sanctifying.
This isn't true. It will match: sanctify, sanctifying, sanctifies, sanctified, sanctifier (and possibly more).