It seems like the ArchaeologyBuddy is missing an excavation point in the Schnottz's Landing digsite. It's the one just to the front and right of the parked Schnottz's Siege Tank nearest to the wooden building. I've come back to my computer three times in the last few days to find it stuck, unable to reach that point.
it seems like it was recently added, because archy and gathermate2 didnt have it in their database either
I got to it this morning but because of the massive patrols up and down the stairs i kept getting my ass kicked. like 7 deaths in a row before i found out and had to manually remove myself.