After I buy the private show and click on it the girl/girls start, but it seems like the clips of them start and move on randomly. I have the setting set to progressive hotness. I have no clue what's going on, or is it supposed to be like this.

Many cards do not play like you would expect in a movie, however some users have noticed when clicking 'Private show' trailers are playing and not the actual private show clips. This can be fixed by un-selecting all the trailers but this option to access the 'clips board' is only available to platinum members and above. Once you get to platinum level you can choose exactly which clips you want to view, Also Wyldanimal has a clips viewer program that can enable users to play what they want. Maybe search the forum for his player add on and try that out.