Bottom line: You had your slab reefing line incorrectly rigged.
It should come from the block on the boom, up to the reef cringle, then straight down (or only slightly aft) to an attachment point on the boom below. In this way, it pulls aft and down simultaneously. As you rigged it, it only pulls aft.
SD mentioned having your sailmaker modify your sail s that you can tie the reefing line around the boom below the cringle. Another quick fix would be to add a piece of hardware to the side of the boom to which you could tie the bitter end of the reefing line. there may even be such a piece of hardware on the port side of your boom -- can't tell from the photos.
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Pacific Seacraft Crealock 31 #62
NEVER CALLS CRUISINGDAD BACK....CAN"T TAKE THE ACCENT