brassavola nudosa, dropping leaves.

[plantluvver]

i cannot find my camera, so a verbal description will need to be enough.
i did not water my orchids for 2 days, because i did not want to water at night. today a leaf fell off. I thought I might have been clumsy, but a second one fell off. Before they fall, they start turning a reddish color starting at the base of the leaf.

what can cause this? i got the plants from Andy's about a wek ago. I was soaking in the sink daily at first, but I was afraid of the orchids not drying out enough.

These don't look broken off, looks like the plant dropped them rather then they broke.