Why does B2TR not remember column widths? Is this a know problem?

I adjust columns.. using all available methods.. ie double click the border
bar, right click and adust manually, select a range of columns and set
manually or double click the border bar. All looks great... then save ...
reopen.. Random Columns are too narrow again. This is one of two huge
workbooks... 18 worksheets each.. lots of data.. and links to each other.
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B Smith
OKlahoma