Step One
Before you upload the initial list, note the output criteria/headers and the order of those headers that are present. Make sure that your additional list/s has the exact same output criteria / column headers in the exact same order. If these do not match then you can either re-output the additional list to match or manually edit it in Excel. If the additional lists are missing some of this data, that is fine that those rows are blank provided that missing data is not necessary for the functioning of your links.