Having seen this post earlier, I felt obligated to throw my two cents worth particularly about luck and that Ltjg (almost LT) who in all actuality does deserve his or her selection. I definitely can say you have a genuine care for the Navy and am glad you are serving in the best Navy in the world: I do not agree though that you had your selection taken away from you, or that someone took your place.
I believe it was a matter of you not meeting the criteria for OCS ; the same rules that all others have to follow. In the process of getting selected for OCS, through vetting, someone discovered something that honestly you should have found yourself – that you did not meet the criteria for a particular program because of your age.
You state that someone was selected as an alternate so I assume this was caught later, but I believe this is something that could have been avoided from the onset. I felt compelled to post mainly because I do not think that anyone chosen for a particular program was chosen because of luck or fate, alternate or otherwise. They earned it, just as you and others have earned my respect for making Chief, because they were fully qualified.