Hi guys, I'm happy that you are pleased with the plants.
Regarding U. asplundii: I have found that this is the easiest plant from Sec. Orchidiodes to grow. I had it growing in a mix of sphagnum orchid bark and perlite, but I expect that it would be happy in any loose medium, maybe even pear/sand, but I would recommend against it. Do not try and force any utric from this section into dormancy, you will most likely kill it. Just water them like a normal house plant - wait for it to dry out then add water until it is soaked. When I unpotted mine to send out they had dozens of tubers and could probably go quite a long time without water if they had to.
Regarding feeding methods. I would advise against it. If you wind up with pests in your utrics, they are extremely sensitive to pesticides (Orthene SP75 works really well, but is expensive and difficult to find). I have never fed my plants and they always seem to do okay.
U. aureomaculata is a tricky one sometimes. When it grows it grows like crazy, but can be prone to dying off. You may want to try growing it in a .5-1cm layer of silica sand overtop a standard peat mix.
Just a general note: never assume that any utric is correctly labeled, watch carefully when they flower, and try and check them against a copy of Taylor's monograph (either your own, or one that probably resides in your local university library). I tried to not send out plants that I doubted were correctly identified, but I was pretty tired when I was packing them and may have mislabeled the bag.