Often when I look at the enroute page for an airport like CYVR, I’ll see the same flight listed more than once, with one row having a leading zero on the flight number. For example, right now I see:
The detail page links for ACA064 and ACA64 both end up at the page for ACA64. Is this caused by an issue in the way that Air Canada submits its flights? I don’t recall seeing this behaviour for another airline.