Not that unusual. Japanese barbers notoriously honed more on the toe than the heel, at least based on the used razors coming from Japan. Any honing stroke where the toe spends more time on the stone will cause that. Of course over years and years of use.
Thinking about it, I bet they didnt use tape and still the "spine will wear at the same speed as edge and angle will be maintained" mantra didn't prevent the toe to shave badly as you mentioned.
By the way, you do need a sharp and well honed toe. How else are you going to go ATG in front of your ears, unless you have sideburns.
Iwasaki beaten by a barber, will be getting reground at some point.
Thinking about it, I bet they didnt use tape and still the "spine will wear at the same speed as edge and angle will be maintained" mantra didn't prevent the toe to shave badly as you mentioned.
By the way, you do need a sharp and well honed toe. How else are you going to go ATG in front of your ears, unless you have sideburns.
Iwasaki beaten by a barber, will be getting reground at some point.