CGI Sr. Software Engineer interview questions

The first interview I had was hardly 15 minutes. I spoke with a senior person from the team and he just described the position and asked about things I have handled. The person was very polite and this meeting was quite positive . Following this, for almost a week, I saw no response from CGI and was confused of what happened so I dropped a mail to one of the hiring managers and he got back and told me that there will be another interview in a few days. I attended this one and this was a fairly difficult scenario based interview for me possibly since I hadn't faced such a kind of interview earlier. The interviewer was very polite again but I felt that I had messed the interview up and so I started applying elsewhere and assumed that this was a closed chapter. Much to my surprise and almost a month after the first interview, I again got a call from the hiring manager that everything seemed ok but there would be another client interview soon before finalizing me. Cut to today with weeks having passed since that call and I have never heard back about this client interview nor anything else from the hiring manager. I am not sure if CGI traditionally has such a lengthy process in finalizing candidates or if I was the only one with such a special case. All I want at this point would be some clarity regarding where this is going and to not be left hanging.