I've not had this happen since buying the Aura last November. Last night the Aura recorded two identical recordings on C5 HD. The schedule was for 7pm - 8pm and was in a series record. Both recordings are an identical length and each plays back the same. A BBC TWO HD programme from 6.30pm - 7pm, also in a series, recorded properly. No other recordings were scheduled until 9pm.
Although this incident is no big deal, I'm curious as to how it could happen.