I'm surprised there was no bedding between the keel and stub. We used to dry fit deep draft keels in the plant (custom & production) when shipping height was a problem. But they were 41' or longer. After dry fitting the keel went on the shipping trailer and the delivery yard would bed, install, fair & paint. Consider that the joint is faired out after installation, how did the bedding wash out and disappear? Was it shipped without a keel, was it NOT bedded at all and a disaster laying in wait all this time . . . QC at the plant was strict, it's highly unlikely the boat left NOTL with an unbedded keel installed.
Having a crucial keel bolt under the mast was just stupid, kinda like having to drop a Vette engine to change spark plugs.
Some of the C&C custom boats with very deep draft keels had a bolt-on shoe with windows in the main keel for bolting the shoe on. It made shipping the boat from one race site to another easier/cheaper (uh, right).
At least now you can sleep at night knowing the problem has been fixed, and know your 10K per day is available for your next adventure