WAHOO! ... well, sort of.
OK, this is interesting, because it somehow led to a solution.
First, when I went to task manager, ApplePhotoStream.exe and ApplePhotoStreamDownloader.exe were not running. The only thing like that was ApplePhotoStreamUploader.exe. So, first I tried to delete the files in the ...\MediaStream\ folder - no dice, because of the aforementioned ...Uploader.exe. So, I killed it and deleted the files. Then I finished the steps outlined.
NO DICE - Still no MyPhotoStream updates. HOWEVER, it told me that my Outlook was no longer syncing to the cloud and asked if I wanted it to. YES, of course. So, I told it to and it shut down Outlook and merged the files. INCLUDING my photos. When I went back into MyPhotoStream, the long unmerged photos were there. Moreover, when I took a test picture - WHAM! - there it was in my PhotoStream.
I hate not knowing why something like this is happening - and what MyPhotoStream has to do with merging Outlook data falls squarely in that basket. BUT IT'S WORKING! ... for now.
Thanks, Viper3773 -
Dave