If I remember the 2014 settlement correctly, we failed FFP, obviously, but there were some allowances that could be claimed in mitigation, principally wages under pre-FFP contracts. The club was pretty sure those allowances would have just saved us (after some fancy footwork in selling intangible assets and after using the lawyers who drafted the FFP rules as advisors), but UEFA changed the rules at the last minute so that we were still over with the allowances. When the allowances were disallowed, the club was over the acceptable limit by a long way. Hence the severe punishment.
The bastards.