The log indicates that the excel sheet is not a data sheet, but a report sheet with all kinds of fancy formatting. Therefore the columns that have no headers, the empty columns, numerics as character, and so on.
Either you get the provider to send you data with correctly ordered, named and formatted columns, or you best start from scratch, look at the file as text, and start decoding it. Something we have done when importing IBM mainframe usage statistics reports into SAS.
Very tedious, but as you can clearly see, proc import can't really deal with this unformatted mess.
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