Not good. From what you said, it appears to me that whoever installed the jib track mistakenly lined up a hole in the track with the bulkhead and drilled a hole and screwed a screw into the bulkhead. This means that water may leak around the screw and into the bulkhead. Dry rot in the bulkhead is bad news. I would remove the screw and fill the hole with epoxy. And, if need be, drill another hole in the track and the deck adjacent to the bulkhead. All the bolts for the track should be screwed into barrel nuts and washers under the deck, not into the bulkhead.

Also, it's prudent to remove the tracks, drill new holes over-size, remove a bit of balsa core around the holes with a small screw driver and fill them with epoxy and filler. Then re-drill the holes for the bolts. This will help prevent water from leaking into the balsa core and eventually causing dry rot and a nasty repair job. See the article on how to do this in the Articles section of this website.