The three in the pool are aimed roughly parallel to the walls. The only one that moved was the one in the shallow end near the steps with the tile, and I aimed that one down. It seemed like it was the threading that moved, rather than they eyelet itself, so that one may just be more loose than the others. The one in the spa is pointed up, and also stuck tight.
When I can get in the water I'll fiddle with them some more, or maybe replace them. There are some other fixes that need doing (like the skimmer needs a door) but I'll get to that after the water is sorted.