webMAN MOD/prepISO - Detecting games is inconsistent

Recently purchased and jailbroke a PS3 CECH-2501A model on 4.87 firmware with the Evilnat CFW. Running webMAN MOD v1.47.35 Full with a Seagate Portable 2TB external drive. It has been formatted with MBR to NTFS.

Here's what's happening:

1. Run prepISO and some games will be detected.
2. Run prepISO again and maybe more games will be detected, or less, or the same.
3. Repeat process until it detects all games. Might take...

webMAN MOD/prepISO - Detecting games is inconsistent