Raft leaving airpgap even when set to 0

[Juan 0]

As you can see, both airgaps are set to 0. What this produces is that it starts printing at 0.2, then goes to 0.4, then 0.6, then 0.8, and then when it starts printing the actual object it goes to 1.10 (my layer thickness is 0.1). It seems to leave an airgap equal to the surface thickness (I havent tried with other values, so I don't know if this is constant). So between the raft and the actual object leaves 0.3 mm, when I am printing only with a 0.1 thickness.

I think it should go to 0.9 instead of 1.10

[Juan 0]

I wonder if someone could help me with this, because I am having warping problems. The raft stays put, but the piece warps because there's a big airgap even when set to 0