I am in exactly the same position. I have 55 points and need the four 8's from the IELTS to bring me to 65 to apply for a 189. I have taken the tests twice now, the last time achieving exactly what your husband got. I am going to keep re-sitting until I get what I need.
I believe I got to where I needed to be in terms of preparation for the L, S & W however I obviously need some help for the reading! It is really demoralising and frustrating not getting what you need, however, hopefully it is worth the time & money in the long-run.
I am organising to re-take for a third time in February. Hopefully it will be third time lucky!!