Use MipMapFileNameTemplate for file path instead of SourceFileNameTemplate

[hannah-martinez]

MipMapFileNameTemplate + SourceMinM is what actually tells us the first mip level in the directory, not SourceFileNameTemplate. This has caused some issues with some transfers.

[hannah-martinez]

Might also be good to test TargetVoxelSizeXnm and TargetVoxelSizeYnm to see if they are set at mip0 or mip 1

Answer: YES. If first MipMap is mip1, multiply x and y by 2