What do you mean coincidental or fishy? Lots of people got hired and some people did not. When I interviewed, 2 of 8 made the cut. All 7 of the people that interviewed with me were nice people ... but that doesn't mean they are the material that DAL was looking for. Only the HR people know exactly why you didn't get hired.
At least admit to yourself that perhaps YOU had something to do with not getting hired, not some stupid conspiracy plan you've devised to help make yourself feel better. Good grief.
If you keep thinking like that and do not learn from your situation, you're going to be flying those ERJs a mighty long time.