I want to create 2 pivot tables from the same data set.

On the first pivot table I want to group by year and quarter and on the other pivot table group by year and month (for example)

Problem is that in excel (2007) creating the first table (year and quarter is fine , when I create the 2nd one (year and month) the first table's grouping is changed to be also year and month.

I did a bit of reading and found out the excel uses the same cache on subsequent pivot tables bases on the same data andI'm guessing that this is what causes this unwanted behaviour.

(Also if the source data changes between creating the 2 pivot tables the second pivot table is based on old data and it's out of date from the start)

Is there any way to force the new pivot table to use its own cache ?

thanks in advance