The clips on the filter side do not work on the other end, that one is set up for a band clamp. Can't really swap ends. You could potentially drill out the rivets for the MAF and swap it around to get the letters upright, but why? The screen is just to stop the major sized objects that penetrate the air box and might interfere with anything downstream in the combustion process.
This assembly was probably re-used from another vehicle where the orientation was correct. They decided to save some money and be practical and just use it as is. That is one of the old Land Rover charming practices I like.
Is this an OCD thing perhaps? Do the upside down letters on the MAF annoy you? Sounds like you have it the right way, it won't go any other way unless you want to drill and reposition?