Ah,, persistence pays off...the "sounds like" didn't find him with surname, so I just tried ernest alone!
...so it likely was just enumerator error he was marked married in 1911...( or he was spoken for so he used the term married?)
I think we may have originally speculated she was a Brown or a Fry...I can't remember what I looked for back then, I just remember looking through tons of stuff and finding little...
EARNEST H BANNES & JENNIE BROWN
MARRIAGE: 18/03/1914 THOMPSON
REGISTRATION # 1914,095141
There are several Jennie Brown, so to pinpoint which one she may be you may want to send for the marriage cert
http://vitalstats.gov.mb.ca/Query.php