I am going to send you a reply that I gave another student with a very similar question.

"A true CAT test like the actual GMAT and like the new Veritas exams is delivered and scored based on item response theory. Basically the test is adapting to you by trying to see what level of question you are comfortable with. Various questions help to distinguish those who are, for example, above the 60th percentile from those who are not above the 60th percentile. Once the computer is satisfied that you are likely above that level, it is not going to be giving you very many questions below the 60th percentile because that will not help to clarify exactly what your score is. Instead the computer is going to work with the idea that you are above the 60th (after your responses have established this) and it will be trying to see exactly where you are above the 60th. So you will be facing questions above that level for most of the test.

With your score of 700 this means that you faced questions above the 80th percentile most of the time on the quant and on the verbal. You could be expected to miss some questions at this level! So missing around 2 of every 5 questions seems about right. What this means is that you impressed the computer and the computer was testing to see how high your score might be."

So no - that is not suspicious! Nice work!

If you want some confirmation. Try the new Veritas Prep Free practice test - the link is in my signature line.