Bob, I realize you run longs, but my 2 cents anyway.
So, one issue may be we are pulling said honey on OUR schedule not the bees schedule, we are also in a management sense maybe adding more nectar storage room than that hive may have naturally. So they just naturally would have swarmed multiple times and taken stores with them.
A lot of it has to do with temp., humidity, on any given flow.
Also if the flow stops wax gland use diminishes.
And if you gave those bees drawn comb, way more than they could ever draw, they are just packing the nectar away. Its what they do.
And if you started feeding those said bees early, and have a huger than normal field force bringing that nectar in it seems to reason with all above said. the hive may have an issue capping All of it on our schedule.