Looks much better. Did you get the bracketing turned off?
A few rules of thumb:
1) Use the lowest ISO you can that gives you the other settings you need. I try for 100 or 200 as much as possible. Higher ISO introduces noise that reduces image quality
2) Use a shutter speed roughly 1/ focal length of the lens. I'm not terribly steady so I up that a bit but roughly for 50mm use 1/50 or faster, for 200mm use 1/200 or faster
3) Depth of focus is the amount of the subject that is in acceptable focus. This is (very simplistically) determined by the aperture. f/11 gives lots of depth of focus, f/2 gives very little.
4) The amount of light you get is the reciprocal of the depth of focus. f/11 very little light so you might need to increase ISO to make the shot. f/2 lots of light so you work in poorly lit areas.
Bottom line, all of the settings are interrelated. Change one and something else has to change to still get the correct exposure.
Get the book, read it twice
---------- Post added 07-22-14 at 12:25 PM ----------
http://www.ricoh-imaging.co.jp/english/support/man-pdf/k-50.pdf