Goldman Sachs 2nd Round

I have a GS Investment Banking second round interview tomorrow, and I'm not sure how technical it will get. I talked to someone who used to work and recruit for GS, but all my experiences have been different from what I've been told thus far.

In the first round, I was told GS focuses only on fit, but my interview was actually 80% technical. In the second round, I've heard it's typical technical questions but a student at my school got her interview moved up early and described it as incredibly challenging.

Oh and this is unrelated, but I hoping someone could shed some light for me. I interviewed at many other BB but never managed to get to second round - so how/why does the #1 IB want to bring me back???? I'm ecstatic, but a little confused. Furthermore, in the first round they kept asking me where else I was interviewing and I'm not interviewing anywhere else (right now) - so doesn't that reflect negatively on me?