Hey anons im in a bit of a predicament here

What im trying to do is breed Heavy Ball Snorlax w/egg moves as a giveaway at some point but for some reason it keeps refusing to pass down ONE egg move.

What I have is a female Heavy Ball Snorlax holding Destiny Knot w/ Curse/Self-Destruct/Counter/Double-Edge

and a 6 IV Ditto w/Adamant nature holding an Everstone so the nature will pass down

However, the baby Snorlax comes out with

~Tackle
~Curse
~Double-Edge
~Counter

It's missing out on Self-Destruct but I checked and it says that you can get Self-Destruct passed down via Snorlax only so im not sure whats going down?

Its really been bothering me and the whole process itself is already pretty tedious so some help as to why this is happening would be neat.

Thanks anons sorry if the image throws some of you off