I was doing Sidestreet Sluice and the story Explosive Demolition was up, finished it, but it did not tick off on my C.H.E.T.T list, not seen this story before so guess its a bug with it not counting for the list.
Both delves don’t count towards it. 
Yep, today neither story counts, both Sidestreets’ “Crocolisk Reintroduction” and Excavation Site’s “Culinary Catastrophe”, have to assume all new stories don’t count - do these Delves still have the 11.1 stories, or only new ones?