HomeRun

- Earier I found actions/tasks executed twice.
- I detected his behaviour again, and found that this only occurs with
actions/tasks triggered by means of a plan (if started by the "PERFORM"
button the action is only executed once)
- I stopped the triggering plan and found that the action still was
triggered, but only once.
- I stopped the triggering plan a second time; now the action is no longer
triggered.

Conclusion: Plans can run more than once at the same time. This should not
ne possible!?