Max number of workes per node

When my work count goes above 9 “broctl status” return the following status:

Name Type Host Status Pid Peers Started

manager manager homey.tacc.utexas.edu running 9134 10 06 Nov 15:44:57

proxy-1 proxy homey.tacc.utexas.edu running 9168 8 06 Nov 15:44:59

worker-1 worker mojo1.tacc.utexas.edu running 31935 2 06 Nov 15:45:02

worker-10 worker mojo1.tacc.utexas.edu running 362 2 06 Nov 15:45:36

worker-2 worker mojo1.tacc.utexas.edu running 31939 2 06 Nov 15:45:02

worker-3 worker mojo1.tacc.utexas.edu running 31940 2 06 Nov 15:45:02

worker-4 worker mojo1.tacc.utexas.edu running 31934 2 06 Nov 15:45:02

worker-5 worker mojo1.tacc.utexas.edu running 31941 2 06 Nov 15:45:02

worker-6 worker mojo1.tacc.utexas.edu running 31937 2 06 Nov 15:45:02

worker-7 worker mojo1.tacc.utexas.edu running 31943 2 06 Nov 15:45:02

worker-8 worker mojo1.tacc.utexas.edu running 31936 2 06 Nov 15:45:02

worker-9 worker mojo1.tacc.utexas.edu running 31938 ??? 06 Nov 15:45:02

The ??? on worke-9 will disappear if I remove worker-10.

I think it only and display problem.