I just bought land through the auctions, and I have claimed it. I divided the land into peices, and the peices I divide off of the original peice give me full rights to everything on the land including selling it. For some odd reason there is always one peice of land left that won't let me set the price. This last peice also has an auction id still listed on the about land window. I called support and they said to post my problem here.
The location of the problem peice is Epirrita (180,85,127). The peice is named Epirrita (Mature) Green. It has 544 meters.