Hi Shirley,
I have never seen multiple indirect inguinal hernias on the same side.
There is indeed only one deep ring so when it opens it becomes the one and only source of an indirect inguinal hernia.
You can indeed have an indirect inguinal hernia and also a direct inguinal hernia on the same side which we term a pantaloon hernia. This is where the deep ring opens and also the posterior wall fails simultaneously.
You can have a femoral hernia simultaneously as well.
So I agree, it is not possible to have multiple indirect inguinal hernias on the same side of the same patient.
Steve