Publishing models in horizontally layout

In designer or architect, all our processes are horizontally.

When we publish the repository, the situation is as follows :

The model in first tab called "Model view" is horizontally (from left to right), and that is how it first appears in the publisher - However, the other views, automatically generated, (useful elements); (simplified process or simplified view); (complete process) are all displayed vertically (from top to bottom).

Moreover, in complete process or simplified process views, junctions between activites are  overlaping on other activity.

I was not expecting the portal to automatically change the orientation from horizontal to vertical... can this configuration be altered through some parameter settings or change the config files ?