I hadn't realised that and didn't look till now. I see what you mean, in fact there are two fields named: FocalLengthIn35mmFormat. At least they have the right data albeit one shows 75mm and the other shows just 75.
Presumably when apps use this information they access it by ID? If so effectively, that would lower the significance down to a typo. Would focal length for '35mm format' ever differ from '35mm film' ?