Task queue webpage counts work requests that it should ignore

The task queue webpage shows this:

I don't really understand where the 6 running work requests are coming from in "Not specified" and in "amd64". Thus I look in the database:

In [9]: WorkRequest.objects.filter(status="running").values_list("task_type")
Out[9]: <WorkRequestQuerySet [('Server',), ('Server',), ('Workflow',), ('Workflow',), ('Workflow',), ('Wait',), ('Workflow',), ('Workflow',), ('Wait',), ('Workflow',), ('Workflow',), ('Wait',)]>

So it seems to count the 2 server tasks and the 4 wait tasks. Arguably those should be excluded from the figures in the "External tasks by architecture".