The 'Recent Status' tab of the 'Multiple batch commit' process reports information on the number of batches processed, not transactions. The number of exceptions on this page would refer to the number of batches that the user could not process (ie insufficient security rights). So if a batch was processed and a transaction in the batch was an exception but the batch committed then it would show as successful. I encourage that we file this in idea bank as a suggestion to be able to validate the contents of each batch prior to committing the batch. The immediate work around for this is to validate each batch manually prior to committing it through the multiple batch process.