I really have no idea in this field so this is just my opinion since I'm a web designer.

Maybe they think they are losing business and that this domain was registered to "steal" traffic away from them? It's what, only 3 letters off from theirs. When I say "steal" I don't mean that this was the intent or is whats going on, just that it's so close to their name and it is being forwarded to another site that doesn't have the same name, but is in the same business..

Just my opinion of how they may be seeing it...