Montreal Landing interview schedule but worried

[Madeline34]

i filled for H&c residence permanent got approved and decision made . Receive letter to go for interview asked me to bring my passport , photos and pr receipt that shown i paid the fee. My concern is does cic does interview at the immigration refugee board. I thought their interview was always at cic montreal at 1010 st antoine w montreal. I wonder why mine is at immigration refugee board at 200 renee levesque complexe gug favreau. Does anyone has any idea . Im kind of worried