Sorry, Michael... It is a very common error but really grates...
The word "and" is a connecting word. By definition, therefore, starting a sentence with "and" is syntactically as well as grammatically incorrect. It would be like having an equation similar to "+ 7 = 10".
Secondly, the use of adjacent, redundant synonyms is also rife. You may have a reason for starting a sentence with "and", or perhaps you could explain "why" people frequently make this mistake. To have a "reason why" is just the same as saying "the reason reason..." or "I'm telling you why why I'm writing this way".
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