Wiener Or Weiner?

I was just thinking about my last post and the spelling of the word wiener. I am not sure if it is spelled "wiener" or "weiner." I looked up both on google, and both of them returned hot dog references. According to my limited knowledge of German pronunciation, wiener should be spelled with the "i" before the "e". This is also the general rule of English spelling. "'I' before 'e' except after 'c' and when pronounced 'ay' as in 'neighbor' and 'weigh'." So why all of the references to wiener spelled "weiner?" Is everyone who works for hot dog companies as poor of a speller as me? Probably so. If anyone knows the reason why there are two spellings for the word "wiener" please let me know. Thanks.