PRD 3.9 - Refresh Excel 2010 Data Source

Hello - I'm not new to BI at all, but I am new to using PRD 3.9 CE. I created a simple list report, with one grouping using Excel 2010 as my data source. That worked fine. To refresh with new data, I go to the Data tab > [Query Name] > Edit Query > Import Spreadsheet > click OK. That works fine. However, when I go to [Query Name] > Select Query, one of the data types changes from "Double" to "Object". This seems to be causing weird formatting problems in the report now. Is this normal behavior?

Other than the raw data, nothing changed in the spreadsheet. There is no special formatting in the spreadsheet.

Is there a way to manually edit the data types?

Thanks.