CCA Actual Delta - 0CO_OM_CCA_9

Currently my CCA Actual and Plan cube are stored in the same cube, and the Actual data is for multiple years, and the amount of data has gotten very large. What I am about to do is create a new cube for the Plan data and also create a new cube for data for 2009 forward. My concern is making sure I don't miss any deltas. For 2009, we are in period 5, so what I would like to do is do full loads for periods 1-3, then start my delta init at period 4. I looked at the documentation for 0CO_OM_CCA_9 and it looks like deltas are determined by a time stamp. So my question is, if I start the delta with period 004/2009, and on the R/3 side, they enter a document with a posting date for a period previous to 004/2009, will that document be picked up with the delta? From what the documentation reads, I would say yes, but I have had this happen to me with A/R, and A/R uses one of the dates to determine if a delta is picked up. Thanks, Keith J