yeah, I think the Kaplan tests are quite confusing.... especially, as they seem to underestimate your score.
I read in other forums that Kaplan normally underestimates your scoure 50-100 points and I hope this is still the case

On top of this, there seems to be many different kaplan sources "where" you do the test, as the screenshots are different (on top of that, there is also the Kaplan CD with practice tests)
first of all to clarify some confusion, I think the "linear test" (in my case test #1 & #2) seems to have another distribution of scaled scores and percentiles.
@TimeSquareDesi: it seems your score that you posted was a linear test as well
Now, I did the practice test #5 (CAT-Test) and the experience was quite different.
The Questions were much harder. For the Quant section, I found them still quite manageable (but I feel like I'm already on a real good level for Quant).
This time I scored 50 / 94%
For the verbal part, I was really bad. I felt like I was only guessing every question and scored 29 / 53%.
Overall score 660.
I feel like the percentiles/scaled are quite representative of my performance. Also looking at the chart of bb, if this chart is valid, I would have score more like in the 620 region. So potentially, the Kaplan tests might be closer to the real score than I think

so if anyone already cracked the riddle how representative the RECENT kaplan scores are, it would be great to know it.
I guess, I should soon do the official gmatprep to get a good picture where I'm standing