Ranger,
I guess it's possible something really weird is going on, but in general Edi is correct. If you place your commander in the middle of a group on the battlefield setup there is no way a horror can attack. A space has to open on the battlefield for a troop to move into it. At least that is how it has always worked for me. Check your setup and make sure you got the army setup right.
You asked for the advice. Please try to be a little more respectful of the answers. Edi may not be the most diplomatic poster, but he is very helpful and almost always correct, and his English is much better than my Finnish.
