Measure names containing "Total" have strange grand total calculation in cubes

In programmatically building cubes for SQL Server Analysis Services using AMO, I've discovered that when a measure has "Total" in it's title, the grand total in the cube is calculated by a distinct sum instead of just a sum (creating very strange results)

This doesn't occur when building cubes using DSO. Does anyone know of why this could be happening?

Please pardon my use of python:

class MeasureSpec(MeasureSpec):
    def create(self, measureGroup, cube, dsv, factTable):
        log("creating measure:", self.name)
        measure = measureGroup.Measures.Add(self.name)
        measure.AggregateFunction = self.aggregateFunction
        measure.FormatString = self.format
        # Set datatype to integer for counts otherwise this is set to the same
        # type as the source column in createDataItem
        if self.aggregateFunction in (aggCount, aggDistinctCount):
            measure.DataType = MeasureDataType.Integer
        measure.Visible = self.isVisible
        measure.Source = createDataItem(dsv, factTable, self.column.getColumnName())

Solution

Here's what was going on. AMO was tagging the datacolumn as byte for anything with Total in the name. It was cycling to 32 which amazingly was the same number as a distinct sum on the column... Wow.