The presence of alcohol skews refractometer readings and makes them read much higher than they should. Therefore once fermentation has begun, the readings need to be corrected/adjusted.
The readings of a refrac in the presence of alcohol will be much higher than that of a hydrometer.
Therefore a beer may be finished and read (example only, numbers arbritrary) 1008 with a hydrometer but read 1022 with a refrac.
If not corrected, a brewer may believe their beer is at 1022. Should you bottle or keg at 1022? Obviously it depends entirely on the beer and yeast and some other factors but with most average gravity beers, it's not likely to be the figure you are chasing.
Considering some yeasts, including the yeast specified here, can slow or stall under certain conditions, you would not be bottling going by the "3 days the same and it's done' adage, so 3 days with a reading 1022 should make you question if the yeast has stalled. Personally I think the adage is useless without some caveat or understanding of fermentation. Of course if using a refrac and you correct the reading, you will realise that 1022 is not in fact 1022 but something much lower.
Hope that makes sense.