haha no dramas that's cool, apologies if you thought I was having a go or critiquing, as I said above, I was merely pointing out that ideally you'd want the trot to be forward and tracking up. But I can see where you're coming from about having two feet on the ground at once ;)
Someone also mentioned a few posts above about the moment of suspension and the photo of 'Onyx' having all 4 feet off the ground. In dressage we desire to have that moment of suspension, and if the horse is carrying itself off the forehand and light, it will naturally offer that suspension. Ideally you will have many moments in the trot of all 4 feet leaving the ground. That is the 'spring' you want in a dressage horse which makes 'dressage horses' in general notoriously bouncy!!