All 4 of my devices are now perfectly in sync again after re-activating iCloud 
I do have a stupid question if I may about Bonjour - and I’m sorry if I’m misunderstanding. I thought it was a ‘bad’ thing to use two sync methods for the same databases? If so (and this is where I think I’m missing something), how can you also use Bonjour sync in addition to iCloud? Just wondering if I should turn on Bonjour, but want to make sure I’m not doing something I shouldn’t. Thanks.