No I don't mind, shoot me pm!
To answer your question and for the reference of fellow members here as well, since I came here I was under working visa so there was really no confusion in declaring the period on when I got my residence permit in Qatar. I believe that this is the point of reference from the government in declaring your actual duration of stay in this country. The moment I crossed the immigration desk at the airport that was the start or entry period written on my PCC. My case is pretty simple and straight forward.
On your case, it's a little tricky and confusing as you came here under visit/business visa which the ministry does not acknowledge that period in issuing PCC. They will always refer to the issue date of your RP. While your declaration on the application would say otherwise. And you'll have to mention that the period of your actual stay here is the very first day that you set your foot here on this soil like, Neil Armstrong did on the moon. (sorry i have to insert that)
The bad thing is that we cannot do anything about our PCC, it is the discretion of the government so we have to live with that.
My advice is to take advantage of enclosing LOE stating that from this period to that period, you are under visit visa and the govt here in Qatar does not include that duration in your PCC.
I hope this helps. Coincidentally, it's my anniversary today in Qatar, just sharing
