you are most wlecome Biak, when I helped Mike initially with this account for the Km side of things much has been discovered since which I should follow up on and further the reference sources for his site. The Germans themselves were quite confused and sorted out, really even in the darkness were somewhat lost and thought that the neighboring S-Boot Flottilles were neck and neck with each other which they were not attacking the US land forces from several different angles. Going through all three German accounts there were at least 5 more claims in all the confusion.......... also of note is that many of the S-Boots would fall ill of the RAF heavy bombers and Tallboy bombs on 14th of June 1944 at Le Harve.
From the linked artical: " ...the toll of the dead and missing stood at 198 sailors and 551 soldiers, a total of 749," Note that this was a rehersal for the assualt on Utah beach. Total dead there on 6th June was less than 600, including those on a USN destroyer sunk by German artillery fire. Ironic, the Germans killed more US soldiers and sailors in the rehersal than in the actual assualt.
Carl one of the reasons Le Harvre was singled out to be blasted off the earth all pens, Boots and whomever to be terminated, re: literally the concern of future attacks on LST's and any Allied shipping during the D-Day hours by the Km little nimble Boots
Growing up on the south coast there are stories about similar events that have never been officially recognised. Slapton Sand was still being dismissed until they started to bring up the heavy equipment from the seabed.
Raal do tell, you mention other stories, stories of what ? S-Boots against Allied shipping or ? if so would not be surprised