Larry was correct, don’t apply resources to summary lines – the results will be inconsistent. However, you probably got the 200+ hours this way: The summary line has a duration that is the working days from the earliest start date of any task in it’s grouping to the latest finish date of any task in it’s group. Perhaps the 200+ hour is the loading across this duration? But then again, maybe not. Like Larry says – don’t use resources (or dependencies) for summary lines.