I am assuming that the sun is to the left, which would mean that the tails are pointing in the wrong direction. A comet’s tail always points away from the sun no matter what direction it is traveling.
Sun to the right. The moving material from the right is from the Sun.
Not sure about the angle here though. In the Sky, ISON is passed Mercury, but, I don’t know if it has crossed Mercury’s orbit....Sky Safari makes it look like it has, but...