profitability segment creation problem

Hi,

we have not defined order as a segment level charecteristic, but it is still creating new segment number for every service order settlement, is there any place where i need to maintain settings to avoid creaation of new profitability segment for every settlement.(all charecteristics of a segment are same in every settlement except order number which is not maintained as a segment level charecteristic) but my system is still taking the order number into consideration and creating new proftability segment for every new order. is there any way to fix this issue.