Potato Onions - a strange seedling

Spud onions reproduce vegetatively - plant one bulb, it divides, and produces multiple bulbs at the end of the season. They aren't supposed to flower, but Kelly Winterton got them to, and distributed seed.
One of my seedlings this year has produced a quite unusual reproductive strategy - it has divided at the base, flowered in its first year and produced seeds,  and also produced topsets!
The plant in question is just above the blades of the secateurs in this picture. note thick wrappers, and divided bulb.

 But I noticed a seedhead on the top - unusual since I didn't get this from one season old seedlings last year. A closer look revealed small topset onions forming - lower left below.

 And in the seedhead, maturing capsules, and some mature seed. Not sure how to deal with this baby...