[infecto]

Honest question, what was the most confusing part for you? I am guessing bag as that one might be more obscure but even then in the context I think its guessable but maybe a struggle for non-native english speakers. Munro seems difficult but since your selective quote makes it worse imo.

"...a second Munro, as the Scottish mountains above 3,000 feet are known."

The opening paragraph describes him climbing/hiking a mountain in Scotland. "His plan was to climb Creise, a 1,100-meter-high peak overlooking Glen Etive...". Which then leads into him trying to "bag" a second one.

Just a counterpoint that it does not feel like sloppy editing at all. I struggle to see what would be difficult here for native speakers.