[NOT A BUG] Kitchen counter doesn't align

@ravenlau122 the behavior you're seeing is by design and is not a bug.  Counters, when placed against a wall, are automatically reduced a bit in depth, in order to accommodate a backsplash (which most counters have).  The corner counter you used is placed partially against a wall, and thus is resized to position properly on the wall.  Unfortunately then, it doesn't synch up with counters placed away from the wall in that particular L configuration.  One workaround is to place a half wall behind the free standing counters.  You could also reposition the counters currently snapped to the wall away from the wall a bit (just enough so that they don't change their size).  You are not the first to find this issue annoying, and I strongly recommend posting your feedback on it in the Sims forums and/or to gurus via Twitter.