Currents can be very unpredictable in terms of what they do with items or people.but I can't see how there was two deaths and then to be found 10 clicks apart
ScubaBoard lost a very dear member in a dive accident a few years ago, and even though the precise location in which she was lost was known and a search began immediately, her body was never found. In the famous case of divers exploring the then unidentified uboat wreck as described in the book Shadow Divers, one of the divers died while exploring the wreck, and when another diver tried to bring him up, he dropped him and was unable to go back down to get him. The body was later found 5 miles away.