I'm not really sure what "very cold process" is.
You don't have to throw the orange soap out. It will still function like soap, it just won't smell very orangey. Citrus EO's are very fickle in soap. They really need an added ingredient to "anchor" them in the soap. It also helps if you are using Oranfe x 5 or x 10.
For your rose & oatmeal soap, it sounds like it only went through partial gel. It'll be fine and most likely the color will even out as it cures. As for the fading scent, without knowing how much you used to the percentage of oils in your soap and where you got the fragrance from, I can't really help.
Lavender is known for ashing. You can sometimes prevent that by spraying your soap with alcohol right after you've poured it and keeping it covered while you're gelling it. The ash will come right off when you use it, usually after the first washing with it.
As for the last soap, sometimes it takes longer than 24 hours.