capacity levelling : change schedule dates

Dear All,

We have some issue with capacity leveling.

We use graphical capacity leveling to dispatch process order (PP-PI).

Process order schedule dates need to be revise also along the dispatch.

In graphical capacity leveling we can drag left or right, but we find it can not give the exact minutes we want.

So we try to click/select the dispatched orders and push button change process order.

In process order we directly revise the finish date & time and press scheduling

(for example finish date 20.12.2011 13:00 revised into.20.12.2011 14:15)

But the issue is after we revise schedule finish date and press button scheduling the process order finish schedule dates back to 20.12.2011 13:00.

Did I miss something here or in capacity leveling we can not do that way?

Please kindly advise.

Best regards,

FreddyHa