Metroid prime 2 shrunk

[BlueFalcon7]

so, i got metroid prime 2 and it was 1.35 GB when I extracted it from the RAR it was in, it was an iso, when i shrunk it with the GCM shrinker, it was 2 GB, is this supposed to happen?

 

[Dysprosium]

As far as I'm aware, shrinking GCMs can cause them to grow in filesize quite a bit. If you want it to shrink properly, try running the utility on it once again.