This question is an exact duplicate of:
Recently I fulfilled my Area 51 commitment for a new site. Also, some referred users did so. Here's my reputation page with the data for March/01 expanded.
I believe it must be the other way round:
- a single record +50 for my own "fulfilled commitment" and
- three ones +25 ea. saying "referred user fulfilled commitment".
Question: Is it a bug in description? Or am I misunderstanding the purpose of the descriptions?