Archivist Challenge: two locations for Broken Railroad or just one?

[ToAsT]

I just completed Archivist a few minutes ago. I went through all the locations except for the final two listed for Broken Railroad, which I decided to complete last. When the aurora started, I went out from the shed to the maintenance yard exterior and clicked on the PC in the little enclosed outdoor area with the bed and - to my surprise - it gave me the challenge completion! Is this a bug? Is there supposed to be another PC inside the maintenance shed as listed in the challenge requirements?

In any case, I'm annoyed because now my save game is gone and I was planning to use my remaining GO drinks, stims, and coffees to progress with the Straight to the Heart feat.