There is no natural page order for the resulting Layout/Position elements from SheetOptimizing
Table 6.103: Position Element
|PositionOrd ? New in...||integer||Index of the Position element on the Layout for calculating RunList/@Ord if multiple BinderySignature elements with no natural page ordering are ganged on one or more sheets of a Layout. The values that are calculated for PlacedOject/@Ord SHALL ascend in the sequence of @PositionOrd. See Example... If Multiple Position elements with the same value of @BinderySignatureID are present, the value of @PositionOrd SHALL be identical.|
Example x-x Use of PositionOrd
The followinge example illustrates the use of Position/@PositionOrd to distribute 4 binderySignatures on a gang job with 2 sheets.