The units are hotlinked modules and I've also checked each unit to verify that they are following the same parameters in the main model file. Yet, still one grouping is showing the correct area value of 274, while the other two are calculating a little more. When looking at their individual files the values are showing up as 274. So I am at a loss of WHY these hidden square footage amounts are still finding their way into the schedule.
In the screenshot the first "correct" value has one unit at 274
2nd has 4 units, which should calculate to 1096, instead its 1098, thus an extra .5 sq ft
3rd has 3 units, which should calculate to 822, instead it is 823, thus an extra .3 sq ft
Individually - the modules when tolerances for dimensions are set beyond "0" are showing discrepancies, but I don't think that should cause the model schedule to separate them when their rounded values are the same.