The score says how it ended. xG says how it should have ended: it is the sum of the chances each shot was worth, not an opinion about the game.
A fair draw: the xG gap is only 0.38.
Osasuna: −1.1 for the season (13 in the table). Levante: −1.4 (17). The gap between points and xPTS is built from matches like this one.