Well, after a completely horrible (O2 stats in the 60s), sleepless night, and three doctor's opinions later I think I got the answers I needed for now. His doctor has stopped the breathing treatments (that I was sure were making him worse) and the steriod shots and got an opinion from a specialist down at Children's in Milwaukee. The conclusion is that Logan has suffered lung tissue damage from the RSV. All of his RSV symptoms (except for the need for O2) have gone and now we will be here until he can make it through the daytime without O2. (That may take up to a week, but we are hoping only a couple of days) When he can do that we will go home with a monitor and O2 for at night.
This is all still very frustrating, but I feel I may see the light at the end of the tunnel.