the buds or the flowers fell off? Have it blooming for 6-7 weeks for you and who knows how long it was in bloom when you purchased it. I believe there is a culture sheet for Phals on this site. Some will sidespike from that node you left but I usually cut all winter blooming Phal spikes by Mid Aug anyway to give strength to the plant so I get a new spike next winter. The flower quality on a new spike is much better than on a side spike.