Smart collections do not sync I'm afraid. Only the normal collections do, many people have asked for the smart collection option but as yet it is is still just the ordinary ones. Sorry.
Hmm. thank you for the Reply. Interesting you said that because it's always synced before and still does. But not all the photos all the time. For example, last night I uploaded 6 pictures and all 6 synced when I right clicked over the "IG photos" In my collections. Then 3 of the 6 stopped syncing when I would edit on my desktop, yet the other 3 were syncing just fine.... does that make sense?
I can only think the previous sync was done from the standard collections and you thought they were smart ones? I have just tried again to see if it had slipped in but no it is still the same, despite being the most requested feature request on the official request site!