You created the following cost center group:

In the cost center group, the R/3 System interprets your choice of Left from "Buildings" to be a move to "Warehouse". You can not move Right from "Motor pool " because no groups exist on to the right of "Motor pool".

The R/3 System interprets Previous level from the "Warehouse", "Buildings", or "Motor pool" as a jump to "Administration". Next level is not possible from "Motor pool" or "Warehouse" because no groups exist beneath them. Next level from "Buildings" creates separate reports for cost centers 200 and 210. This requires you activate the Single value indicator in the previous definition of the variation area.