First of all, I'm sorry for the poor relationship that this dealership (this salesman) and your wife are experiencing. And many of these forum members have suggested solutions so I won't suggest another.
But I do want to comment that it does seem that BRP has finally achieved a satisfactory production level to meet demand for the SM5. Originally, all pre-order certificates constituted an intial production demand, along with some additional SKU's for dealer demos, the Spyderteams criscrossing the country, etc. Now it seems that dealerships are able to order additional SKU's of the SM5 and BRP has sufficient supply to re-stock dealerships with inventory which probably is allocations based on dealership sales volume this past year. That explains why some dealerships have floor stock inventory and others have still to wait for delivery of inventory as additional pre-order certificates are generated. (Your dealership perhaps has just recently generated strong demand or sales thus was not allocated additional SKU's when BRP finally was able to provide re-supply. Unfortunately, he still has to use pre-order certificates submitted through BOSSWEb to get the product. That doesn't excuse the salesperson from lying)
Hopefully, with the SM5 orders satisfied sufficiently, the SE5 will now begin production in numbers. And additionally, the red SM5 will start to make its way into the dealerships. WARNING: Be prepared for pre-order certificates for SM5 red and SE5 all colors to be as confusing as to who's first, etc. Why? Because, those same dealerships that have had good sales will probably be the first to receive distribution of their allocated units. That means that even if we knew who was the first SE5 ordered, if it didn't come from a dealership that BRP has identified as high sales/volume, it probably won't be the first dealership to receive its allocated orders, thus first ordered to actually to receive the first SE5 or red SM5.
I'm the optimist, that all orders will be received way before your pre-order certificate deadline, just not in the order you think it should. And to Derwin... we both will get our SE5 before September!