I have tried 1 process builder with one condition and two actions call the same future method;
2 process builders each call the same future method and only one time the future method is invoked.
I have checked to see if my process builder worked properly, so I have 1 of the process builders invoke the future method and the other update a field.  That worked so it leads me to believe there is an issue with calling a future method more than once at a time.  Is there a workaround? Another way to execute this besides creating a separate class to accomplish this? Use the time schedule for 1 hour?

I have cleared the cache & cookies, I am using a new Developer, I have tried google chrome( including incognito) and mozilla web browsers.  I have logged off and logged back in..and I am still getting the same error.  I would appreciate some assistance with my error.