But apart from my previous post....
I've never used a continuous servo, but my understanding is that you don't know its position like you do with a normal servo. If I have it right, the value you send to a continuous servo- which would be the angle (or more correctly a pulse representing the angle) of a normal one- is the continuous servo's speed. So you won't know where it is, unless you use some kind of encoder to keep track of the position.