Bee-escape removed!

This morning, lifted the yellow hive's cover, and discovered the top honey-filled super still filled with bees. Lots of indignant humming, which soon subsided. (These are the best-tempered bees!) Evidently they'd either spurned the bee-escape, or they couldn't escape downwards by that route. I took off the cover, and lifted a couple of frames, and discovered the comb yet uncapped, so lifted off the top super, removed the bee-escape from the inner cover, removed the inner cover, put the full super back onto the hive, the inner cover on top, and on top of that, the cover and a brick. Evidently this super is not ready for extraction. Query: did they remove the capping during the night? Conclusions: (1) should have looked at a couple of centre frames when had the hive open yesterday; (2) use the bee-brush to remove bees from frames: poor bees, trapped all night above that dad-gasted bee escape!