There shouldn't have been. Are you able to post the workbook (twbx file) and/or the excel file?
I am still having issues with the file but figured a work around which requires me to cut and paste values instead of reading the formulas. One more weird thing data that was formatted as currency doesnt show but when I converted in excel to numbers no issues. Can I email you the file? It's a little sensitive and I dont want to post it