YAY! I was hoping we'd hear good news from you today. That was a close call. When they spin like that one was, it's usually before they go down for good.
He may be a little blocked up since he's still swimming funny. I honestly don't know. But it looks like he's your little pig about eating so watch him closely each time you add shrimp to see if you need to cut the lights on him again. Does his gut look bigger or swolen compared to the other? Any red spots?
The curl/waggle sounds like normal swim confusion as they approach metamorphosis. They've been swimming like a larvae without so many fins to manage. Now they need to learn to swim like a clownfish.
Here is a pic of a juvenile just after metamorphosis. See the little fat orange fish body with a touch of white on the head? You'll probably have them looking like this within the next 24 hours. This picture and the previous one I posted at 11 days are from two different batches.
Within a day of this last look, they'll look like the one I posted above at 11 days.
The next pic I have in my gallery isn't until 24 days. By then, they've got top and bottom fins and are starting to get the waggle side fins.
I'll check through my pictures to find something in between. I know I took lots of pics. They get one stripe at a time. You'll see the stripe come on their heads first and you'll have those within a couple of days.
So glad the little guy made it. I've been worrying about it today and am happy to see your post.
You're soooooooooo close to making it through.
Good luck!
Cathy