I understand now, and I hope your boat is not experiencing it. Unfortunately, a hull-to-deck leak is Not uncommon in the boat-building-universe, but it Is completely unnecessary. The highest quality boats will often fiberglass the shoe-box-lid joint, in essence making the hull and deck one piece. I know most boats are Not built this way; just too expensive. Most boat manufactures bolt and/or screw the joint and use adhesives to make the seal. How well did the 'adhesive-guy' apply the adhesive? Was the joint clean, debris-free when applying it? Most people who have followed Out On The Reefs 'crooked pilothouse' issues know that his Parker should not have left the factory (at least, my opinion), but it could also mean, other parts of his build were also over-looked. All his pilothouse window leak profusely; None of my pilothouse windows leak at all! Nor does my hull-to-deck joint. (OOTR's boat issues could have been; new guy on the production line? disgruntled old employee? someone who just didn't care about quality?).... It's a long story I won't try to rehash here, but in short Linwood Parker offered to replace his boat; it was just too heavily customized by then, and OOTR decided to keep it. In many ways, he has made a good living off the crooked pilothouse, and I believe he has in a way actually help sell Parker boats; very few 21' boats are as capable as OOTR has shown them to be.
