Hmm, okay so riddle me this.
So is it rebloom when you have a clump where almost all fans send up scapes at the same time but then you have one fan that sends starts sending up a scape a couple of weeks later? I've had this happen this year (but never before). The first scapes have just finished blooming or have 1-2 buds left when the lagging scape starts to bloom. Whatever it is I like it because it extends the blooming season for that cultivar. But I just don't know what to call it. If it matters, the size of all the fans are about the same so I don't think it has anything to do with them growing large enough to produce a scape. They are also not new plants.
Edited to add: Same thing as what Nancy described. We were posting at the same time.