Problem with stirrup/leg when riding western?

When I ride in my western saddle I have a really hard time putting my feet in the stirrups when I first get on. And then the stirrup is like turned in when my feet are in and it hurts my ankle sometimes and then I have a hard time keeping the stirrup itself straight and not turned in. Its kind of hard to describe. The saddle is kind of old....maybe 10-20 years old. I have ridden english for 6 years and just started riding western. Maybe this is just normal with riding western and I am just not used to it. Is this normal??? Is their a way to fix it???