I'm pretty sure I need to move the toe-holes on my invisible shoes.  My toes slide a little toward the inside, and my heels slide toward the outside (kind of like the shoe is rotating under my foot).  And just from visual inspection it seems the holes need to go toward the outside about a quarter inch.  But that seems pretty close to the existing hole, so can I fill the existing hole with shoe goo if they are too close together?  Any other tips for moving the hole?

Mark

Here are some pictures of what is going on.  I tried making the heel strap tighter, but it led to the strap rubbing my heel raw.  This was after about 9 miles of hiking.  As you can see, the left heel is sliding out, but the right heel seems okay now.  They both got rubbed raw by the strap, and the right one even bled a tiny bit.  Do one's heels get used to the straps, kind of forming a callous or something?  

Now I'm thinking that the left shoe's toe hole needs to be moved, but the right's doesn't.  What do you think?