I would start from the following checks for human error, some of which are very basic, but you'd be surprised how often even good practitioners have a momentary senior moment...
1. age/birthdate and date of administration
2. form (A or B) on both the paper record form and in the scoring software. And make sure all the subtests, record forms, and test easels were from the same form.
3. norm (original WJIII or WJIIINU 2005 normative update)
4. age vs. grade norms (in OP's case, these should have been age norms, as there are no preschool norms)
5. stray spaces or x's in computer entry
6. entered in correct fields, or with correct item set labels
7. reading fluency score entered correctly (it should be correct items minus incorrect items, no penalty for omissions)
This is very helpful, thank you. I'll see if she can double-check these things, and hopefully she will ask the publisher, too.
Loy58, yes, DS has to be 5 before he can apply, but I think the test can be up to two years old.
TNC, I will let you know if I figure anything out. And I'd love to hear an update if you get an answer, too.
And thanks to everyone else who chimed in. I'm new to the testing world, but not to math, so I'm glad that everyone else thinks it's not right, too.
Luckily, the goofy broad reading score is still high enough to qualify him for early entrance kindergarten, which is what we are considering, but I think the broad reading really underestimates his reading ability (he's 4.3 and reading at a late 1st/early 2nd grade level). Hopefully the school will not base too much on the score alone.
