I don't count the day I put them in, so if you put them in on the 5th then day 10 would be the 15th. Another more experienced hatcher said she thinks of it like this, "if the eggs go in on a Friday, they should hatch on a Friday three weeks from now. That is easiest to remember.
To help me keep my hatch anxiety in check, before I open that bator I ask myself if doing so is to sooth my anxiety, curiosity, etc, or is it for the best interest of the chick. If I can honestly say for the chicks best interest then I do it, otherwise I leave them alone.
Yes, when they go into lockdown you remove the turner. I place one of those no-slip drawer pads on the bottom so babies have a cushion and are more sure footed after they hatch. Just lay them on the pad, trying to not place the big end up against anything firm, like the wall, this helps the babies stretch and get out of the egg easier. Some folks place them inside cardboard egg cartons with the bottoms of the cups cut out, so the egg stays upright, but I found that laying them doesn't hurt anything and you can see the eggs wiggle too.
Good luck with your hatch!