The main purpose of the above paper [Nuclear Science and Engineering, Volume 193, p. 327 (2019); https://doi.org/10.1080/00295639.2018.1531620] was to test out a variety of approximate methods for inverting a generating function. This task was accomplished fully and is unconnected with the misunderstanding that we wish to report here, which concerns how the source multiplier is used once it has been obtained.