You may have thought you spoke quite clearly and eloquently, but your words got twisted somehow and more than likely ended up causing a simple misunderstanding. Don't ignore it for too long, or it could really turn into a problem. You may feel that apologies aren't necessary for something you didn't mean to do, but you really should clear things up with the offended party. Swallow your pride and say those two magic words if need be: 'i'm sorry' goes a long way at times like this.