That same issue with folder view type happens with Windows Explorer so it isn't specific to DOpus itself. Maybe it is using a combination of both the standard Windows method and DOpus' one?

I suppose the problem is that DOpus is so powerful that there will always be something that isn't perfect for anyone somewhere in its design and way of working. Personally I just have the default for folders set to show a general directory layout, and then manually set specific folders to display for specific content when needed. I don't know if DOpus can do the same, but in Windows Explorer (all NT versions since Win 2000), you have been able to set a folder view in a root folder and then set it so all child directories inherit the same settings. This is very useful for example when you have all your music inside one parent directory as you can set that directory to view as music files, and make all child directories take on the same settings. Speeds things up.

Regarding the download folders, I know exactly what you mean. I also find it will remember where the last location was you downloaded to, but keep jumping back to that location during your attempt to select a new download location. Or it defaults to the Windows 7 library folders which I hate and ignore. If there was one thing in Windows 7 I could remove it would be the meta library directories for Documents, Music, Pictures and Videos. They are virtual directories designed to allow home users an easier way to find all similar content in one location, but as it is a virtual location you don't know the real location of anything when navigating within these libraries. Win 7 also has a tendency to open a new Explorer Window in these libraries instead of remembering where you last were. That for me is the most annoying thing. For downloads I instead download everything to the default Windows User/Downloads directory so I know exactly where it is downloading to, and then I move it to its proper destination once downloaded. That is also useful as I keep things like downloaded drivers in there so they are easy to find again later. I also have that directory set to show items in order of date, making it easy to locate the most recent downloads.