That bromination substitution pattern is actually incorrect. Probably a bit more advanced theory than you've been taught, but the bromine atoms would add para (opposite) to the substituents. Both the methoxy group and the hydroxyl are activating ortho/para directors, para position favoured over ortho due to sterics. After the first bromine is added, it will also act as an ortho para director. The position that satisfies the directing influences of the most substituent is ortho to the first bromine atom.