Hello, For me also the same scenario ! Today I've attempted the PMI's mock test and scored 67% which is very less when compared to my scores in Prepcast mock tests which were varying
b/w 75% to 80%. Also, I don't see any similarity b/w the questions I see in PMI mock and prepcast simulator questions!!
As per my observation, some of the questions in PMI mock lack clarity, are ambiguous and some of the questions doesn't relate to any of the options provided!!
One such Ex: One of the questions was asking about to choose a document, but the ans. turned to be a Proj. management Plan!!
But yes, as suggested in this group, the scores may improve on the 2nd attempt which will boost our confidence level

Thanks.