If only it just overshot the localizer a bit...
Such an overshoot is usually followed by 2 or 3 oscillations about the localizer that may occasionally even put the aircraft beyond the one dot left or right of track, disallowing a descent on the glide. If "helping" the aircraft on the localizer by a twist on the heading bug did not cut it this time and such a situation is to be expected, using TCS or completely switching off the autopilot to manually establish the aircraft within the tolerances (disregarding the flight director for a moment) is the only way to avoid a go around.
The intercept algorithm is nothing Bombardier should be proud of.