All of a sudden, Acrobat is adding (only some) bold borders when converting page from excel!

I tried before to respond but couldn't. It is Not Excel. I am very fluent in Excel. I changed nothing with borders between successful and unsuccessful printing. I went back, deleted, and redid all of the borders and it still came up with 2/3 Bold borders in the pdf. Now I have to print-to-pdf to get a good pdf. If it were borders in Excel, the pdf would come out the same as saving to pdf. Excel does not have a history of disfunction. Acrobat does! The create pdf function within the app also will not convert a .xlsx file, even though it is listed in the file type examples in the window. The bottom line is that for the last several years and several versions, Acrobat has always had some function that does not work correctly. IE; I also cannot create from clipboard more that one page of data copied from the desktop outlook emails. Acrobat would be a much better program if Adobe focused on fixing their issues instead of blaming other programs all the time.