Its not luck when you lose to someone 2 weeks in a row. As far as giving games away, well, turnovers etc. are always a part of most loses. Not taking care of the football can be a side effect of pressure or many other things. Teams like Calgary always seem to come out on the winning side of close games. They are just good and make few mistakes, its not a secret, they just outlast their opponents. Talent wise, there usually isn't a huge difference between the top team and the bottom one. The top teams just never make mistakes and they protect the ball.