Double def. give the taxidermists a call.
I might have apossible explanation for you, doing taxidermy myself. I've noticed over the yrs that some deer just have more smell to them when I recieve the hide. Sometimes the smell is a result of large chunks of meat being left on the hide, andmeat beginning to spoil. That smell often gets into the hide. Of course time, and temperatures play apart of that. The sooner the taxdermists can recieve your cape from time of kill, the better it is for them. Another reason for the smell is the oder rutting bucks put out, which can become real strong as well.
Most taxidermists put the hide through a cleaning solution during the tan process. Plus I do know their are deodorizers available for mounts. Most smells can be taken care of, and fade with time. Hopefully barring any ill effects taken by your taxidermists your mount can also be fine.