Ran into an issue where I didn't initially specify which exposures (visits) to use in template-building vs in the main ApPipe processing, and the good seeing selector chose nothing for one of the three HiTS fields. In addition, there was a known-trash-WCS 2014 visit, 289777, that apparently has great seeing and showed up as both a template and science in a totally wrong spot on the sky (-2 dec instead of +2 dec, cute). It has been entirely removed from DECam/raw/all, finally.
I re-ran both the ApTemplate step (took about 20 minutes to build the graph) and the ApPipeWithFakes step (took about 24 hours!!! to build the qgraph), with these inputs and data queries -
dataQuery: "instrument='DECam' AND skymap='decam_rings_v1' AND detector NOT IN (2, 61) AND exposure<300000"
dataQuery: "instrument='DECam' AND skymap='decam_rings_v1' AND detector NOT IN (2, 61) AND exposure>400000"
It is a miracle that the reprocessing was not bitten by the NCSA filesystem having a bad day. At a glance, the output all looks good now, finally, and an analysis notebook is forthcoming.