Blood on bottom of chick

She most likely will be fine depending on the amount of yolk.  If it really just a bit then she can probably absorb it herslf out of the egg, leave her in the inubator a bit longer before putting her in the brooder.  Only time will tell.  You can't really do much of anything.  I've had chicks with similar problems in the past and they have pulled through and are very healthy and happy hens.

You can take out your 3 dry chicks, I usually remove the lid of mine once a day to do so. It shouldn't harm the others to much.  Try to open it only as much as you have to to keep as much humidity in, but it will be fine.  You don't want your dry chicks rolling other eggs around.  I haved opened it with pips many times and have never had a dry membrane, but if for some reason you do, then just take a Q- tip and wet it with warm water and then rub it along the membrane being careful not to get it into the chick's nostrils.

You can also take a spray bottle of hot water & mist the inside of the lid before closing back up any time you have to open the bator during hatch. Raises the humidity back up IMMEDIATELY.

For the first week, you should go 95 degrees and drop it by 5 degrees every week after until they hit room tempature.  I actually keep mine at 100 degrees for the first 3 days, I don't want them chilled in their new environment.  In your set up, one side should be kept at that magic tempature and the other should be left alone. So that if they get hot, they will tell you and gather on the side without the heat source, while if they are cold, they will huddle under the heat source and start chirping (loudly), so they'll tell you what they need. If they are happy they will be running everywhere and sleeping somewhere near the middle.

We have some little chicks out in the hen house, but in their own area patitioned off with a window, cause they needed more space then the container in the house. I'm not really sure how old they are, but I maybe six weeks, I have no idea. We got them from another hen house along with the hens we got. I did notice that they get louder at dusk. Wonder is this because they are getting colder?

I never check my brooder temp. I let my babies tell me when to move the light. If they are huddled up under it in a pile they are cold & I lower the light. If they are scattered as far from the light as they can get they are too hot & I raise it. If they are lounging comfortably here & there or running all over they are perfect. I also have never used anything other than a standard 100W household bulb in my heat bell. No picking, no noisy babies at night, no neurotic chicks. A red lamp is just NOT a necessity & is a waste of money as far as I'm concerned. Others will try to tell you you HAVE to have all this expensive equipment. You don't. My chicks went to the coop the end of April (Ohio weather) with no heat at 6 weeks old. I closed the pop-hatch at night until temps stayed above 50F overnight & haven't closed it since. I put chicks out now that temps stay over 70F most of the time as soon as they begin to feather at 2-3 weeks. As long as I put them out in groups of 5-6 they do fine & are able to huddle together for warmth. I also tend to throw my younger chicks in with my Silkies to grow out until they are about 6-10 weeks old (depends more on si2e at this point than age) until they are big enuf to go in my mixed layer coop or breeding pens. I have even caught my Silkie roos sitting on 1/2 grown chicks when the chicks decide they are cold. It's comical to watch them actually.