Yes, it does look a little crooked. It is easy to straighten out, but certainly needs plenty of caution. The bottom right prong in your first picture looks a further distance from the shank than the other three. In some of the other photos, the ring has been revolved so that it becomes the upper left prong. It is pretty easy to point it out. It is a fine adjustment, not a major deal. Definitely, let the seller do the adjusting.
Thank you! I'm glad I'm not going crazy and that my eyes were right. I've sent a request to the jeweler to make adjustments. Luckily for me, the ring is still with them!