Level Of Effort Activities in P6

Hi all

I was given a schedule today by a colleague and in the schedule there are a number of Level of Effort activities and I noticed that all of the relationships that these activites have assigned, are in the successor window and no activites exist in the predessor window.

The obvious thing that I can see is that the scheduler has dragged the relationship line from the start of the Level of Effort activity to the task, which makes the task activity a successor

I wanted to find out if creating the relationships this way has any effect on the schedule.  i.e do all the caluclations work correctly.