Yeah I've never seen that before......what version are you guys running on?
Only thing I can think of is maybe some sort of bug with that dashboard.....but then that looks like it is the default Background Tasks for Extracts view
On that view, could you check the Backgrounder ID for those 10 tasks?
If you only see 8, then it's probably an issue with the view. But something very dodgy is going on if you see 10 different Backgrounder IDs!
Dang Justin, great thinking! Unfortunately I didn't check
10.3.5 and yes, default Tableau Server admin report.
I am baffled how this could possibly happen, I wonder if it's a bug or something else. One thought that I came up with at lunchtime is what happens when an extract data connection has 2 datasources that it needs to query and then join together? Does it possibly spawn off another backgrounder if one isn't available? Do any of these extracts have multiple connections within the extract? I haven't had a chance to test out this theory yet.