Howdy Ralph,
Thanks for reporting the nit
The metronome does report using the note duration base of the first measure. To get around that, you can make that first pickup measure a real 4/4 measure, then select the rests and hide them. This gives the cleaner score with just a pick up measure, and keeps the metronome reporting "true" to the rest of the score (which is in 4/4).
Sorry for the inconvenience here.
ttfn,
Sherry