i have confirmed that this bug occurs as follows.
archiving commands append to a buffer for the archive. they do not
save, revert, or kill that buffer. my shell workaround, to allow
archiving given completely unusably slow archiving, moved the archive
files [so that they would not be slow].
when i do a bulk archive, it will sometimes put 2 copies
entries into the archive file. it is more likely to occur
if i am archiving more tasks. at times, it seems certain
entries do this repeatably, but i am not sure.
there are times when i think i have reset everything (git is
clean, archives
