They may have deducted .2 to account for taxi time. I honestly don't know. But just the idea of logging a major chunk of your multi time as a safety pilot smacks of wrong in my book. I flew every second of my multi time save when my instructor was demo'ing something and even then I logged the whole flight as 'dual received'.
Plus, as a matter of fact you know they weren't wearing the foggles. Nobody is there watching. It's their word only. I see this happening most of the time, "hey, I won't tell if you don't".
Besides, even if they did follow the rules (they didn't), so what? If you flew 100 hours in a MEL...really flew it and I flew 100 hours with half of it (even minus .2 per flight) as a 'safety pilot' then who's experience is better? It's a scam and everyone knows it.