You must use pause between actions. Use a "wait until" perhaps?

Wait until the first action has completed. Remember, ControlCommand does not wait (from this manual page)

What I recommend doing is talking to the Auto Position directly rather than sending commands. Something like this, and makes sure the action doesn't repeat. Because you can't wait for something that will never end.

    void runActionAndWait(string actionName) {

      var  AutoPosition = (ARC.UCForms.FormAutoPositionerMovement)EZBManager.FormMain.GetControlByNameAllPages("Auto Position");

      if (autoPosition == null)
        throw new Exception("Auto position control doesn't exist");

      var action = autoPosition.GetAutoPosition.Config.Actions.FirstOrDefault( x=> x.Title.Equals(actionName, StringComparison.InvariantCultureIgnoreCase));

      if (action == null)
        throw new Exception($"The action '{actionName}' doesn't exist");

      if (action.Repeats)
        throw new Exception("This repeats and cannot be waited for");

      autoPosition.GetAutoPosition.ExecAction(action.GUID);

      while (autoPosition.GetAutoPosition.IsRunning) {

        System.Threading.Thread.Sleep(100);

        if (IsClosing)
          break;
      }
    }

Alternatively, if you have to specify a timeout because the action repeats, do this...

    void runActionForTime(string actionName, int timeoutMs) {

      var  AutoPosition = (ARC.UCForms.FormAutoPositionerMovement)EZBManager.FormMain.GetControlByNameAllPages("Auto Position");

      if (autoPosition == null)
        throw new Exception("Auto position control doesn't exist");

      var action = autoPosition.GetAutoPosition.Config.Actions.FirstOrDefault( x=> x.Title.Equals(actionName, StringComparison.InvariantCultureIgnoreCase));

      if (action == null)
        throw new Exception($"The action '{actionName}' doesn't exist");

      autoPosition.GetAutoPosition.ExecAction(action.GUID);

      for (int x = 0; x < timeoutMs; x += 100) {

        System.Threading.Thread.Sleep(100);

        if (IsClosing)
          break;
      }
    }

Lastly, you can cover both bases with something like this...

    void runActionForTimeOrStop(string actionName, int timeoutMs) {

      var  AutoPosition = (ARC.UCForms.FormAutoPositionerMovement)EZBManager.FormMain.GetControlByNameAllPages("Auto Position");

        if (autoPosition == null)
        throw new Exception("Auto position control doesn't exist");

      var action = autoPosition.GetAutoPosition.Config.Actions.FirstOrDefault( x=> x.Title.Equals(actionName, StringComparison.InvariantCultureIgnoreCase));

      if (action == null)
        throw new Exception($"The action '{actionName}' doesn't exist");

      autoPosition.GetAutoPosition.ExecAction(action.GUID);

      for (int x = 0; x < timeoutMs; x += 100) {

        System.Threading.Thread.Sleep(100);

        if (IsClosing)
          break;

        if (!autoPosition.GetAutoPosition.IsRunning)
          break;
      }
    }

Outstanding, thank you!!

I'll post back when I have this running but this is exactly what we needed!

Got your example code in and running, tried all variants.

It is oddly still doing the same thing with multiple calls to all of the variant runAction  methods you suggested. It will run the second behavior, supporting what you and the documentation say is correct, in that it just won't wait even though the these methods tell it to.

I'm going to tinker around the edges with the delay structures,  because the While...GetAutoPosition.IsRunning test doesn't seem to be doing anything or it is hanging up for some reason.  A few debugs felt like they were stalling in an infinite loop especially in the version that does not use a timer.