do you know what kind of plant you have? but in general:
keikis (hawai'ian for "baby") can form on flower stalks on phals or canes on dens. they're a form of asexual reproduction and basically a new little plant grows out of a growth node. leaving it on the stalk can sap energy from the mother plant, so you may want to take it off and pot it up, but wait to do so until it has a collective four inches of roots of its own.
bud blast: it happens. could be a change of temp, or a sudden change of condition, or the plant just being huffy.

i had a den i'd been trying to get to rebloom for four years, and it grew a spike, and it grew buds, and they got big, and the first one shrivelled up. man was i PO'ed. the rest of the buds grew and bloomed just fine though (for two months in fact).
can you post a pic of your plant? we love pics.
