Could really use some QUICK advice

So I am a first time hatcher, out of 12 eggs, one was bad from the beginning, 2 were lost later in the process and at day 22 I lost all but one. We are now on day 23 and I checked the last egg and it wasn't moving. Yesterday I had gently opened the eggs that were lost and the chicks were fully formed with the majority of their yolk absorbed but died for some unknown reason. A little while ago I was opening up the last egg to see why it died and to my surprise, it moved. I checked VERY carefully before it was opened and there was NO movement at all or else I would have left it. I am keeping the internal membrane moist but there are still thick veins and some yolk and I am pretty sure that the movement is a chick butt. I think the little guy is also upside down.
Unfortunately these were shipped eggs that were iffy to begin with.
I have kept the temp between 99 and 100 for the whole time, they were on an automatic turner until day 18 and the humidity was at 50% until lock down then raised to between 65 and 70.
I didn't start checking them with the light again until day 22 since there were no pips or chirps. I was also very careful not to move them too much when I checked or let the temp or humidity drop in the incubator.
Any advice on how to help the one that is still alive but open and possibly upside down?

I don't think there is much you can do except wait and see what happens. Just keep an eye on it.

I have my webcam set up on top of the incubator so that I can watch it on the computer I am also recording it for my kids to see and I am hoping that this on comes out ok. I am not too sure but I am hopeful since it is moving around ok now. It still has some yolk but it seems like it's trying to flip itself the right way. I am just SO thankful that I was opening it at the air sack when I thought that it was dead...

So just an update, the chick is still alive, I have been watching over it and keeping the membrane very moist and there is now less yolk than before and the veins are starting to lighten and thin out. This sweet little chick is a fighter! We are starting to see more dark feathers and less yellow gunk and Here is an updated picture

Hope the little chick makes it !!!

So after all day of watching and keeping the membrane moist, we are still making happy progress!! I know that it will be a long night but as long as we are still making this progress it'll be worth it!

Good luck! I hope it continues to go well. I don't have any advice but I am hoping for the best for your little gal or guy!!

Keeping our fingers crossed for this little one!

Thanks everyone but unfortunately, he was upside down and when he was just about ready to come out he poked through the membrane on the wrong side of the shell. I kept all of the eggs big side up in the automatic turner and I laid them on their side with the big end tipped up a little when it was time for lock down. Anyone know why so many would end up upside down and dying right at the end like this?

They may have been to big to turn the right way? From the posts I have read it may have to do with the humidity being to high