Secret key not found - is this normal?

[Kurt Fitzner]

I have found that on the gpg command line, I can't specify a key to sign
with by using a user id unless that user id is the primary.

For example, my primary user id is kfitzner at excelcia.org, and one of my
secondary ones is kfitzner at shaw.ca.  This works:
 $ gpg -u kfitzner at excelcia.org --detach-sign <file>
while this doesn't:
 $ gpg -u kfitzner at shaw.ca --detach-sign <file>
 gpg: skipped "kfitzner at shaw.ca": secret key not available
 gpg: signing failed: secret key not available

I can list the key this way, though:
 $ gpg --list-key kfitzner at shaw.ca


I never noticed this behavior before.  Is this normal/intended, or have
my too-frequent edits of my key done something bad?

	Kurt.

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