Kinda by definition this can't be correct. English is defined by what the native speakers speak. It might be that sometimes how they say things doesn't match up to how you were taught was correct, but it is likely to be correct for their dialect.
What about regional accents? For a non native speaker of English, understanding English as spoken in Scotland is a challenge. And I heard people born in UK complaining they had sometimes difficulties with American English (for example with real life/social things). This without speaking of people from India who speak an English which is slightly different from US' or UK's English (and equally valuable and "native").
So I guess a definition of "native speaker" is a bit difficult.
Interesting tangent that I somewhat recently was made aware of; some of what they speak maybe isn't English.
Later I discovered to my surprise that a few of the words I had placed in the "standard German" category were actually from the regional dialect.
I actually think it was more helpful to my language abilities to have learned two different German dialects (one of which was standard German). It also helped me to understand how languages change and what it must have been like several centuries ago when there wasn't a standardized German and people had to struggle to understand someone from far away area that in theory spoke the same language.
Your own native language probably has similar things - I know with Dutch, someone from one region can struggle to understand people from another region if they're speaking in their own dialect.
OP may very well have better-than-average spelling. To quote Harvey Pekar, "average is dumb!".
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