Interview Carousel - How many is too many?

Hey all,

I have recently been interviewing for a publicly traded company in their corporate finance division. At first I had 4 interviews in one division. Thinking I was going to get the job, I was given a call by HR to interview for another position in another division within Corp Fin while still being considered for the original position I applied for. I went through 3 interviews with the newest position and left feeling that I had a great shot..... Only to get a call again by HR saying that they went with someone else for both the position but there is another role you can interview for in a different division. Mind you, this is all still in the same group. I probably will be working closely with the people who told me to fuck off.

What am I to make of this? I know I should feel like I'm still in the running to get a job at this company, but when is it going to start negatively effecting me when I go into my fucking 11th interview? Mostly venting here, but has anyone been in this situation before?