Pivot Table is resulting in scientific notation when summing rounded data

[PriorityOne]

I am pulling data via odbc microsoft query. One of my fields has the formula Round(GL01+GL02+GL03, 2). It returns only two decimal places in the query, but creating pivot causes extraneous data after two decimal places. I then proceeded to add a column to results of the query rounding that field to 2 places and bring that field into query. I need to know why the following numbers do not add up to zero:

14736551.160000000000000​

12913520.610000000000000

1824309.150000000000000

-12913520.610000000000000

-1824309.150000000000000

-14736551.160000000000000

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The sum in my pivot table is

-0.000000003725290 I have refreshed, deleted and started over. Removed the table associated with the Pivot and tried a smaller subset of the pivot. If someone knows how to solve this, it would be appreciated. I told my wife I was going home an hour+ ago Sorry for the formatting and thanks for the help! -ZM​

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