When I put in my Jund Sacrifice decklist and hit sort by CMC I get all of the cards sorted in alphabetical order instead. I've seen this issue before with my Dredge decklist too.
Screenshot included for clarity:
If it helps, this is the maindeck and sideboard I used:
3 Beanstalk Giant
4 Blood Crypt
1 Castle Locthwain
4 Casualties of War
4 Cauldron Familiar
4 Fabled Passage
5 Forest
4 Gilded Goose
3 Korvold, Fae-Cursed King
1 Massacre Girl
4 Mayhem Devil
1 Mountain
3 Murderous Rider
4 Overgrown Tomb
4 Stomping Ground
2 Swamp
1 Thrashing Brontodon
4 Trail of Crumbs
4 Witch's Oven
2 Duress
3 Lovestruck Beast
1 Massacre Girl
4 Noxious Grasp
2 Shifting Ceratops
1 Thrashing Brontodon
2 Wicked Wolf
When I put in my Jund Sacrifice decklist and hit sort by CMC I get all of the cards sorted in alphabetical order instead. I've seen this issue before with my Dredge decklist too.
Screenshot included for clarity:
If it helps, this is the maindeck and sideboard I used: