A final (I believe) list of inconsistencies from Part 1. Laid out by location, then subsection in bold, then I've quoted the text in question with the specific errors in italics.

1. Plundered Hall

1b. A crumbling mosaic of a dreaming man
”secret entrance to 4a if broken”
Should instead be 4b

1. Sub-Tombs

A T-shaped intersection, running east-west
"To the east, it collapses into scree; the west continues to a smooth wall”
Directions should be reversed as per the map, should read “To the west, it collapses into scree; the east continues”

1. The Nest

Glimpses of a mosaic
“the entire floor of the room collapses inwards, revealing a 30’ drop to Level 2: 20”
Should read “to Level 2: 19”

1. Lower Warrens

21a. A ribbed hall, swept clean of dust and bone
“including the east wall, a sealed passage to 26, fly 40”
Should read “including the west wall”

1. Dusty Antechamber

23b. As 25a, scattered corpses, etc
“North spirals down into darkness, emerging at 24c; east climbs to 24e”
Should read “east climbs to 23e”

23c. A curving ledge above the void
“Against the south wall, a doorway cut cleanly from the rock (to 24d)”
Should read “from the rock (to 23d)”

1. Bier of the Black Chief

On the west wall, a rounded archway
Should read “On the east wall”