Although the LSAC could at any point start making section 4 or 5 experimental, I don't think they will. It makes sense for them to keep the experimental in the first three sections. It seems to me (from looking at personal experience and that of friends) that they typically only have two different forms of the scored portions of the test. Then the experimental is the same section # for everyone, with many different content portions. The two forms are 'flips' of each other... For instance with this test, since the experimental was 3, there is the:
A B Exp C D version and
B A Exp D C version
This allows them to ensure that no one will have a scored question before the break that someone else has after the break. They know that people will always talk at the break.
I also have a theory that they always put one of the Args in the first half (AB) and one in the second half (CD), but I have yet to fully support this. For this test it does look like the first two were Args and RC, and the last two were Args and Games.