Hi Mark,
I always hide my stocks after I sell them for clarity in the account viewer. When I then buy them again and download the transaction from my broker, the stock stays hidden. When I download a lot of transactions, things get confusing.
I suggest unhiding an hidden stock if its share count becomes different from 0 because of an internet download. Presumably, if you are doing it by hand, then you know what you are doing. Or provide an option "Automatically hide/stop downloading stocks with 0 shares".
My suggestion might not work (I haven't thought of all the implication), but my issue is real.
Cheers,
.lcua