Hello David,
Thanks for the honest review. Our flags have full colour penetration on both sides. Meaning, the colour and image bleeds to the back side so you see it. Therefore, yes, images mirror on the backside when they're coming in from the front. But, we can also produce flags where the image doesn't mirror on the back side. For example. 'Happy Holidays!' will read from left to right no matter which side your read it from. We would simply put in another layer in between to make that work. Our Durapoly flag is more on the transparent side when looked at close up when flying, in comparison to our Nylite fabric, which is more opaque. Our apologies for not meeting your expectations. We have these options available for custom orders and preferences that we can discuss to get what you're looking for.
Thanks David