That sounds very odd indeed. The line you refer to is just the in-memory table name. You don't have to set it yourself. If you don't give your table a name, it'll just allocate a generic name of some kind to the table. The in-memory table name is of no relevance at all to any of your front-end calculations - you can see it if you go to the "Data model viewer" from the top left menu in your app, but that's about it. It should not influence your front-end standard deviation calculation. My suspicion is that maybe, just maybe you changed more than one thing in your script and that the WebStats: table name tag is a red herring (i.e. not actually the root cause of why your stdev function did not provide the right answer).