Turn off shuffle in iTunes

When in Shuffle mode, the shuffle icon in the Now Playing window is white arrows on dark grey button (as shown in the screenshot above - by the ringed area "method 2"). Either click on that Shuffle icon so that the icon becomes black arrows on the same light grey background as the rest of the window:

or use method 1, click on the Controls/Shuffle>Off. The two-arrows-pointing-at-each-other icon in the right hand side of the window is the Repeat button.