Jeanne_O

I am relatively new to quilting but have been sewing for years.

I am doing a block of the month that uses batik fabrics. I have 2 questions:

1. I accidentally stitched a seam in the wrong place on a square within a square. When I picked out the seam, it left little holes where the needle went into the fabric. Is there a way to fix this other than making a new square within a square?

2. Does batik require a really sharp, thin pin?