Refreshing Data from Linked Sources

Hi,

I have a workbook that contains about 16 worksheets, and the majority of the worksheets are linked to other workbooks on dropbox. When I hit "refresh all" the columns change order. Meaning, if I open up the file on drop box and compare it to the linked work sheet on my computer, the columns are not the same. On the linked worksheet, the part number column which should be in column A will be over in column P (or whatever). Some linked worksheets do not have the problem and some do. Any thoughts as to what might be the problem?
thanks