Sassafras K2 can both monitor concurrent usage and also enforce a stop on 11th program launch of a 10 concurrent use license entitlement (amongst mny other functions).
Definitely worth considering as just monitoring and allowing the 11th launch and dealing with retrospectively could well be putting you outside of the Adobe terms and conditions of their concurrent license model.
Or if you would like a chat please feel free to get in touch or come visit the Academia stand - K9 at the BETT show next week.