Nothing is worrying at all. The default scan operation only reads zip/rar/7z headers. If you need a more in deep operation, either use

- Settings->Compressor->Full Zip Structure Scan
or
- Scanner->Checksums->decompress rom & check crc32 (or sha1/md5 check if the used datfile provides this data)

Both operations will slow down the processes.


Roman Scherzer