From your dates and ultrasound results, you would have had sperm in your body from the guy on the 11th when you had sex on the 14th. So if there was sperm on the 14th from pre-ejaculatory fluid, either guy could be the dad. Your ultrasound dates don't rule it out -- there is a few days' margin for error in the 9th week, but not that many days (not even a week), so between the ultrasound, your last period, and the cramps you had that you feel indicated ovulation, it seems like there is no way to know for sure unless you go ahead with the DNA test. The one thing in the favor of the guy on the 11th is if your cramps really indicated ovulation on the 14th, since the child is a girl, he has a bit of an edge. (There is a theory that sperm carrying the chromosome for female live longer and swim slower, and sperm carrying the chromosome for male swim faster and live shorter.)
In regard to your initial question, I have not heard of any DNA testing place that insists on mailing results to both parties, it seems like they will mail the results to the person who orders the test.
It seems pretty important to think about ways that you could track down the other guy, too, if you get a negative on the guy you have always been sure was the dad.
You said her dad went to prison when you were 1 month pregnant. When did he leave? I assume it was after mid-October?
If you request a DNA test, your guy in prison will obviously know, because he'll need to do a mouth swab. (Unless you are planning on claiming his DNA swab is needed for something else, but frankly, I don't think any guy being asked for a DNA swab would be fooled even if you pretended it is for Ancestry.com.) The lab won't automatically mail him the results, but surely he will want to know what they are.
The easiest way to do a DNA test without the guy in prison learning of it would be to do one with the guy from October 11 who you don't think is your child's dad. Boxers wouldn't prevent pregnancy, presumably he is still around?
Then if you get a negative for Mr. Boxers, you can apply to get a DNA test with the guy in prison, with a pretty clear idea that he is indeed the dad.
Have you ever asked the mother of the guy in prison for photographs of him at about age 1 or 2, and compared them to photos of your daughter from that time? Sometimes the match of the dad as a baby to the child as a baby can be really striking even if you don't see the resemblance of the adult to the child.