I totally agree! I think someone or something is wrong there. I sat the same test in November last year, having paid the £75 fee. (That's like nearly an hour in the air for me!)
Anyway, I have a 1st class Physics degree and these things are my specialty. (sorry, dont mean to brag!) But i thought the tests went rather well, only to be dissapointed by a similar type of letter. Now that you mentioned it, how well do they actually mark these tests, and for that type of money, I'd certainly like some feed back!!