Fred and I went through both lists today, and I have a few comments.
Re 1) from Fred's list above: I don't believe that's warping, but regardless: the cores of bright objects often have very bad colors with non-zero weights (meaning: they haven't been properly flagged). That's a problem.
Re 2): there are non-detections of even really bright objects. For the life of me, I don't know what happened with those. That's an even bigger problem.
The second list in the notebook is more instructive of flaws in the deblender or its configuration. I have categorized those into ~4 different cases, which we should check in detail. I believe we understand all cases, but only a close inspection will tell. If true, we have strategies for dealing with these cases.
@fred3m: Can you export the images of the second list together with the corresponding weights and the peak coordinates into, say, numpy or fits, so that we can run those offline as a testbed?