P: Sorting photos in shared album

Yes custom order is working (the only option that actually has any effect), but you can't really expect users to sort hundreds of photos one be one and repeat that after adding new ones.

I still have this problem, can someone at Adobe fix it?

We are talking about album share not LR web. 

I'm afraid there is no change. I don't use the web sharing anymore because of this. 

In my case the entire web sync process has stopped as well. LR Classic hasn't uploaded photos at all for a long time. 

I'm not really understanding your description of the problem. Whatever order is currently displayed using the Display tab (the "mixing pallette" symbol) in your LR Web application is what your user should be seeing. If that's not the case (i.e. the user is still seeing a different order, even after refreshing their browser), then clearly there's a problem, which will need Adobe to investigate.
Note that when using that Display tab you have the option to drag and drop images into any manual custom order, OR you can reset any existing custom order into one of several different sort options (Capture Date, Filename, Rating, etc.), by using the "Revert" option in the expanded settings dialog. When you make any changes the new order will become the new "custom order" when you subsequently use that sorting option in any of the other client apps, and it will be the order that your user should see after refreshing their browser.

Just tried, the sorting options don't affect the web view at all, only the custom orders with the "mixing pallet" symbol are updated, but I'm not going to sort over 100 photos manually, whats going on there?

How are people supposed to work with that, this is a paid application afterall.

Does this still happen? A user of a shared album just asked me if it could be sorted in anyway, assuming its a mess on their side. For me as the owner its shown correctly.

@1374280 Oh, I’m glad you could figure out the steps to reproduce the bug! I’ll do the workaround in the meantime thanks :)
@evikne Oh yeah? I think I don’t have that, but I’ll check one more time.

I've experienced the same thing.

It is also frustrating that if we add more photos after we've sorted, the new photos always appear below all the others and do not follow the sorting order. Every time new pictures are added, we have to repeat the sorting.

Actually it looks to me like you've found a bug.  The cause appears to be using that sort control twice quickly.  Two separate changes are being applied at once when you do that and it's resulting in a jumbled mess.  I'll file an issue internally and hopefully we can get a fix soon.

In the meantime, it looks like the ugly workaround is to "sort by Date taken", confirm that your share has that order, and only after it looks correct select "invert order".