... yes, and that's why your claim that "It's false, insofar that it's not the 'data' you give to 1Password." is wrong. Which was my point.
Also, whatever the unusual definition of data you use that results in metadata being excluded is irrelevant (and it is unusual, look up the definition of data in any dictionary). The important part is that 1Password was not making it clear that it does not encrypt certain parts of the "information" you put into it.
