The issue here is that @AddEdge was originally made to take a single EPI dataset first and then the anatomicals after that ("@AddEdge epi0+orig anat1+orig anat2+orig anat3+orig ..."). Your order is reversed. I put in a couple new changes to allow for resampling to the grid of your choice with "-master mymasterdset+orig" or let the script find the dataset with the smallest voxels among all the datasets provided (slightly changing its previous behavior). I just checked this in, so look for binary updates following this posting.
Also consider @snapshot_volreg for a single image picture of the EPI and anatomical volumes with edge images.