I put a ticket in with SAP and they told me standard functionality will only support two levels. I am a bit disappointed as it lets you build as many levels as you setup in config, but will only display the aggregated capacity requirement up to the 2nd level. I haven't been able to get an explanation from SAP as to why you are allowed to configure other levels. I didn't want planning to run on those other levels, I just wanted to use the higher up levels to display a total of the capacity requirements from the real work centers at the lower levels.
Andrea