I'm pretty sure that it is a separate truck. I didn't see a close-up of the "2 Pump" apparatus, but it should have a "shop number" on the front doors, below the windows, in about 1.5" tall lettering. This is the number that denotes a truck's position in the CFD fleet. It's a letter, two numbers for the truck's number, and two letters for the year of purchase. The new 36 Pump is P4908, which is P for Pumper, 49 for the 49th pumper in the fleet, and 08 for a 2008 purchase. The original Bronto truck (the big one) is A0298, for the 2nd Aerial in the fleet, purchased 1998. For the most part, the number "in the fleet" means virtually nothing - as older trucks are retired, their numbers are re-used; for example, A0471 was an aerial parked at Training for ages, until it was finally put out to pasture even further (auctioned off or otherwise disposed of); one of the "baby Brontos" became A0406 in its place.
Having said all that, 2 Pump's "normal" truck these days is P0398, which is a pumper built in 1998. For a number of reasons and through a number of different rules and international standards, fire apparatus must be newer than a certain age. Some rules/guidelines say 15 years, some say 20 years, and I think some might say 12 years or shorter. If Calgary is replacing their trucks on a 10 year cycle, that means that you will see a whole mess of new pumpers this year and in 2010. (36 Pump was using P1098 for a while and there are tons of Pxx98 and Pxx00 trucks out there.)
The issue with the naming of 36 Pump may have something to do with something I think I mentioned earlier in this thread about capital expenses. When a station is approved in budget, its pumper is allocated at the same time. So perhaps it must remain named 36 Pump to satisfy the capital expenditure for what is for now named 36 Station.
The intent on naming CFD apparatus for about the past three or four years has been to call everything with a pump and water on board an "Engine", to align with the international standards on incident command systems. (Google "Incident Command Structure" or "National Incident Management System" for more info on these.) That's why the squads have "ENGINE 10-02" and things like that on them. The plan has not been followed through with for reasons I'm not 100% clear on; I think a lot of the delay has to do with the chief officers of the department going through turnover (i.e. Wayne Morris leaving and Bruce Burrell coming aboard, and the deputy chiefs retiring and being appointed), and different plans being assessed.
Last tidbit of the moment: Rumors abound of two Quints (trucks like 16 Aerial) being on order for CFD. Whether they will be operated as Quints or as Aerials remains to be seen, as well as any further details. I literally have heard nothing more than the above.