Cut/Fill Summary surface volume differs from Elevations Table surface volume

[Anonymous]

I think that the cut/fill summary volumes should equal the volumes in the surface legend table. They do not. Is this just a bug or is there something I'm missing? 

Why doesn't the total of cut from the surface legend table (5313.00 + 2786.24 = 8099.24 cy) equal the total cut from the cut and fill summary (8098.19 cy)? It seems to me they should be the same since they're measuring the same thing.

Same for fill.

[Anonymous]

I also noticed this issue for the first time, and found that exporting the two surfaces into another drawing and running the comparison again, made the elevations table figures agree with the summary.

[rshiraziHE8BJ]

Hi,

I really like to know why when I type reportsurfacevolume and compare one surface to the other, it shows a net volume that is different than the legend table at the end. Do you know why the final legend table does not match the report surface volume command on civil 3D??