maybe I'm getting too old or loosing it but I always thought if you want more clearance on a bearing you would go 1-2 thou. over size.
If you cut a crank 10 thou. under standard size then you would install a 10 thou. under bearing .......forgetting clearence for the moment.
If your crank is standard and you need more clearence wouldn't you have to install an over(standard size) bearing to give you the desired clearence.
Maybe our termology is different here in Canada.