I have actually rewatched and rescored the fight now.

1. 10-8 Hatton
2. Very tough call, I'll give it to Collazo for arguments sake. 9-10 Collazo
3. 10-9 Hatton
4. 9-10 Collazo
5. 9-10 Collazo
6. 10-9 Hatton
7. 10-9 Hatton
8. 10-9 Hatton
9. 9-10 Collazo
10. 9-10 Collazo
11. 10-9 Hatton
12. 9-10 Collazo

So, If Collazo won the second it was Hatton's by 1, if Hatton won it, he had it by 3.
The judges scored it 115-112, 115-112 and 114-113 which is spot on imo.