Re: Orchid roots, don't worry about it, Orchids are significantly able to take aridity, and as such sideways roots won't be a problem if they're out of the pot. Best thing to do is repot in a slightly larger pot with sphagnum moss.. if you repot too wide the Orchid will fall over. Orchids don't root well in soil, and don't like being watered too much.
On another subject I brought two unusual plants from a garden centre recently, they are only seedlings, one was a Grevillia robusta which has very little chance of surviving out of a greenhouse, the other one the Albizia julibrissin, an attractive flowering plant/tree. They're both staying indoors for the winter although might have to keep the Albizia outdoors, not sure really.