Hello Kraszer!
Sorry for the delayed response! There is no automatic source matching at the moment, though we are trying to match parameters of an input source as close, as possible. In your case, default values for resolution and frame rate that, you see in the export window, should corespond to your timeline, isn't that the case?
Regarding the tint, can you share the settings and that allow to reproduce this behavior? Is that the case with the current version on the site?