Have people been refused a visa extension in Thailand when applying as a married person?

This year I'm going to get a visa to visit my wife. It's a 60-day visa, since we're married. Once there, I want to apply for a visa extension because I'd like to stay in Thailand for six months. Normally, I get a multiple-entry visa, leaving and re-entering Thailand, but this year I was thinking of getting a married visa, which allows for 60 days and the possibility of an extension. My question is, have you ever been refused a visa extension when you applied as a married person?

This year I'm going to get a visa to visit my wife. It's a 60-day visa, since we're married( i am canadian). Once there, I want to apply for a visa extension because I'd like to stay in Thailand for six months. Normally, I get a multiple-entry visa, leaving and re-entering Thailand, but this year I was thinking of getting a married visa, which allows for 60 days and the possibility of an extension.

My question is, have you ever been refused a visa extension when you applied as a married person?

Thank you