When exposure bracketing is on, it is obvious in the top LCD display and in the viewfinder. You will see the letters "BKT" on the right side of the top LCD display and on the right side of the viewfinder. It is possible to turn it on unintentionally. I'll also echo the caution above about Easy Exposure Compensation. I tried that feature for a while but turned it off because I was ALWAYS unintentionally adjusting EV with inadvertent movement of the rear command dial.
Also, what is wrong with the exposure? Looks like it was taken at mid-day and -1 EV should not have been a problem if you're shooting in raw. You can adjust a couple of EV either way in post processing. In fact, it might have even been desirable to have -1 to keep from blowing the highlights on the light colored building in the foreground. It looks like there is a lack of contrast and saturation typical of a mid-day shot, but that can be recovered in post processing. Also, with respect to dynamic range, there is generally a lot more available in the image than is typically displayed by the settings on raw conversion software. You can tone down the highlights, lighten up the shadows, adjust mid-tones, etc in post processing.
I'm not sure what a neutral density filter would do for you in a shot like this. A neutral density filter is just negative EV. Unless you're trying to get a really slow shutter speed and you're at the end of your EV range in the camera - just using negative EV adjustments on the camera should work as well. A polarizing filter, on the other hand, may have been beneficial.
I think you may want to explore the post processing tools available to you a little more, before you lament the dynamic range of digital vs film.