Yeah working memory is about holding information in your mind and manipulating it, not about long term recall. Comprehending and remembering clearly something you read is different to hearing a random string of letters and numbers, re-ordering them alphanumerically and spitting them back out.

My DD has the memory of an elephant. She recalls stuff from when she was very young in intricate detail. And yet her WMI was 13%. When she had her CAPD assessment she got her diagnosis on the back of her incredibly poor auditory working memory. In her case the CAPD tests actually showed that her working memory for things that had meaning to her was 98%, her working memory for nonsense data was under the 2nd. Memory, working memory in particular, is a strange and mysterious thing if you ask me.