When looking at flights from GVA-YHZ for this summer, I was given the option of a strange routing which involves GVA-YUL-YYZ(Continued as AC 835)-YUL-YHZ. I ended up booking this routing rather than simply GVA-YUL-YHZ, or GVA-YUL-YYZ-YHZ as it offers more flights and miles/segments

. Is this permitted, or will AC try to reroute me directly to YHZ upon arrival in YUL? Will it be an issue when connecting with AC staff, baggage etc?
Cheers,
Marke190