I have a small mystery on my hands. I checked my mileageplus account this morning and noticed that over 2000 miles have been posted to my account, with the description provided as "Cartera". Even more interesting the miles that posted today were supposedly earned back in October, a few months before I started activity pursuing miles for non-flight related activity or even knew about shopping portals. I've tried googling it to no avail. Does anyone know know what this could be or had a similar experience? Could it just be a fluke and the miles were accidently deposited into the wrong account? I'm perplexed!