12 months - No Length Retention!

So it's official, it has been one year and I have not retained ANY length, in fact, my hair is shorter.  In the picture on the left, my hair is between 5-6, however, in the picture on the right, my hair is between 4-5. This sure is a long lasting setback!  I need to figure this out, by my calculations, I should be beyond BSL by now, but I am sitting at this odd length between APL and BSL.  Any advice is greatly welcome.