Deck the halls?

As I was walking into the office yesterday to check my folder (our version of an in-basket), I noticed a signup sheet on the bulletin board. I glanced at it, then went about my business. I noticed ivitations to the Christmas party sticking up out of the other teachers' folders. There wasn't one in mine. I took all the papers out of it just to double check. Nothing.

I walked back to the signup sheet and said, 'So this is a signup sheet for the Christmas party I haven't been invited to?' To which Bossman chuckled and said, 'Darn, you've found out about it.'

I'm pretty sure it was an oversight, but it was odd how I was the only one not to get an invitation.