In this case TCS and WBH handbooks are talking about different things. TCS is referring to the world's ability to construct its navy, while WBH is really sticking to the commercial shipyard capacity, I think.
Keep in mind the whole starport rating system (which you are free to modify in YTU) is based around Starships need a Type A, Non-Starships need a type B, repairs can be done at a Type C. WBH pp198-199 is talking about *build* capacity. As discussed on p199 a given type C may have no build capacity at all, but by definition still has repair facilities (otherwise it would be a Type D).