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The peak for the L shape at about 280 is a clear indication that there are two photon peaks that appear as the L shape. It is also interesting to note that the peak for the Hockey Sticks is at about 155 which is about 10 ADU higher than where the V1 algorithm normally peaks. This may be because the non-adjacent pixel is not part of the photon and instead this 3 pixel peak is actually only a 2 photon peaks. Furthermore, it may be beneficial to turn the L shapes into 2 pixel peaks when they aren't actually two photon peaks (i.e. when the non-max adjacent pixel is below the high threshold). This distribution is shown below.

Image Added

As expected, the Hockey Stick shapes peak does shift to the left. The peak is now at about 137 ADU; this is less than the peak of the entire distribution, but it is closer. And, visually, the peak appears to be thinner than before. The L shape peaks were also affected.