Not everybody has the same background and, for many people out there, mispelling words or grammar mistakes are not a sign of incompetence
Sometimes they are a sign of a person who is really smart but did not have sufficient formal education. Sometimes its a really educated person that just has little talent for language skills. Sometimes its a person that speaks more than one language trying to communicate in whats best for you and not them
"Payed" is a nautical term.