OmniGraffle 2 messes up imported Visio documents

I just bought OmniGraffle 2 for iPad to be able to have Visio documents on the go and maybe make minor edits to them with iPad.

I tried to open two rather simple home floorplan (one vsd, one vsdx) documents but both drawings were messed up.

Is there a way to get Visio document to OmniGraffle 2 properly or did I lose 45€?

I’ll be happy to explain the issues in more detail and I can take screenshots if needed.

I have the same issue, it spend me almost 50USD…(I paid because of this features)

Is there any guild line I can follow to import the vss/vsd file as usual. At least make me feel worth to paid.