To make it official, and restate what I stated above, I apologize if I took your initial post the wrong way. Before posting anything I checked your other posts, saw two other threads that could be seen largely as complaints, and were complete fly-bys, particularly since you never looped back in on a 10 day old thread about the flash. My rule is "If it walks like a duck and sounds like a duck...", which will occasionally get me off on the wrong foot. I'm not here to "protect the Nikon name", as might have been suggested. But I do know what it's like to have to manage purposeful disharmony on a forum like this, so if I can call it out before it gets out of hand I will try to do that. People with real and good intentions, such as yourself, will call me on it, I will give my, "Mea culpa", and we can move on, while rascals will tend to show themselves as who they are and the moderators can do their work. So again, my apologies for being abrupt up front. I hope you understand that it was based on more than the fact that I can be a bit of an ass when it comes to trolls on forums. So while I wouldn't simply pay it no head, as Rocketman suggests, I would use it as knowledge in future posts that providing information along with complaints and questions will always get you better, more prompt and more complete answers.
Now, as for your complaints, I'd still love to see a version of this photo with all the EXIF data intact. If this is actually an ISO 100 image taken in manual mode at f/7.1. We don't have a shutter speed, and if the camera is set to ISO 100, but Auto ISO is turned on, the camera will adjust the ISO in Manual exposure mode so that the shutter speed and aperture combination produce a proper exposure. I use this method for birds in flight all the time, with a shutter speed of 1/1000 and aperture of f/8 and will get ISO settings between 100 and 6400 depending on light. From what I can see in your photo I have a hard time believing the ISO for that exposure is actually 100, but if so there are other factors that can contribute to what you're seeing. Resize the original to 1000px on the large size and upload again and that should preserve the EXIF data for us.
As for shooting RAW and post processing, it's an absolute must to learn how to do this properly, particularly if you're going to be shooting consistent interiors. Learn how to set white balance properly - both in camera and in post. When shooting interiors you want a consistent look, so avoid Auto WB settings. Set it in each room/lighting condition, or at least just set it to Shade if you're using natural light indoors, or for the proper type of lighting in the room. This way at least you'll have a consistent look in all the photos you take of each room and can apply a consistent adjustment if necessary. And yes, fixing perspective in post is an important way to distinguish a real estate photographer who knows what they're doing from those who don't - and there are plenty of those.