Take into consideration Wales have lost like 10 of the last 13 games and it makes more sense. With the only wins coming against Scotland and Italy and Ireland.
Until Wales start winning games consistantly I think they'll always have +1 odds against the top 3-5 teams in the world. They just aren't consistant.
“There are three things all wise men fear: the sea in storm, a night with no moon, and the anger of a gentle man.”