I was looking at this statistics recently, and I had an overly high APR figure, something like 140%. It’s possible there was too little data on curation, and that caused an error. I just withdrew my delegations and regained control on Friday, so the rewards will start coming in next week; that might be the reason. Most likely, the statistics are based on the effective HP on the balance, and before this Friday, I had around 50 effective HP. Now, I have about 3500 HP, so the jump and recalculations could be the cause of this.