loose and wiggley rothschild

[mrphilips]

i have a wee rothschildianum. it grows very slowly and as i'm still new (1 year experience), i have made some mistakes with it.
a) i think i over-watered it as it tends to lose it's bottom leaves - i lose a leaf for every new one that i get. also it had three little new planst growing off it at the base, but this spring 2.5 of them went purple then brown then died... i still have a tiny leaf down there, but i don't hold much hope. so now i will be more cautious with the water
b) it's wiggley. the thing has very few roots as i saw when i repotted it - like two - and it's very loose in the chunky bark mix.
it has been suggested i use a bark mix so that is what i have used, but i tried to keep a lot of perlite and small lava rocks in the mix (about 20%) as i feel that would help with a firm rooting in the mix.
a nearby orchid dealer (who has lead me astray more than once) suggested a coat-hanger wire support that grips the outter edge of the pot and supplies support to the plant, but i could never get it to hold right without seeming to potentially disturn this delicate guy.

any suggestions?
is the loose plant problematic?
should my mix be different?
any suggestion on securing it a bit more firmly?