Several bugs that are affecting my gameplay and fun

PC: Mission bug:
The House of God - Seeking Zmola (Found him but nothing help, cant start talking to him, he just stood there in the mill)
A Bird in the Hand (Trying to returen all the bird, but it keeps me in the talking cutscene forever so I have to shut the game down with alt+F4)

Visual Bug:
When doing Alchemy, oil, wine and other stuff has the same white color.

Other Bug:
Not sure is it a bug or what, everytimes when Im overloaded, i cant walk up on stairs.

Please help, KCD is such a great game but these bugs are triggering every players