Then why doesn't the Eminence tooltip also display the correct value taking into account SotWS? :P
The effect of SotWS only applies once you perform the heal, the actual heal for chi burst as an example is 1095 + 120% of AP, which is then multiplied by 1.2 when taking into account SotWS. If it were as you state it to be, then the base heal wouldn't be 1095 or 1094 as shown on your spreadsheet but 913, and it's obviously not 913 :P