In my entry "I am out of Mail Jail" I list four errors that you have written me about. I just learned about the fourth this afternoon and posted it straight away.
I wish I were perfect. Alas, I am not. The important part: the pattern is still workable. How do I know it is workable? I had two very reliable proof-stitchers stitch the project. They may not catch every little error but they do catch errors big enough to keep someone from being able to work the pattern.
As the mystery progresses, I will write about designing the mystery, in fact how I design everything. A number of you have asked me to write about inspiration, sources and the process and I will enjoy writing about it. When you read the description of how I work, you will learn it isn't an exact art. But I will save all this till later. For now, carry on, all of you out there in stitcher-land, write me if you find errors and I will post them on my blog.