Neither are particularly infuriating. I’ve come to accept not everypony shared my standards for spelling, and it doesn’t help that letters may be transcribed and transmitted in Horse code, which introduces additional error sources.
You should see some of the spellings I get in my fan mail! I assume most are from foals given the erratic spelling and hoofwriting. I think the worst one was Toilet Sparkle, that one I couldn’t tell if it was a spelling error or if somepony was making a joke at my expense. I was not amused.