You must have left an old disc in when you updated. I did the same. After installing the downgrade PUP and then enabling QA flag, I went to install Rogero v3.7. I didn't realize I had left Fight Night Round 4 inside of my PS3. Instead of installing the Rogero, my PS3 installed the 2.76 OFW from the disc. It even gave back the OtherOS that $ony took away. I then installed 3.55 OFW which gave the regular losing OtherOS disclaimer. Then I updated to Rogero v3.7 and from there I installed Rogero 4.30. It's not unusual.