If you still have a specific question how to do something, post it back to this thread.
However, when you have a some time, take a read through this thread. There, you will see folks like Nudel, some other Opus users , and myself, discussing the current Formats/View Modes behavior and what some (so far all) of us feel the behavior should be. That thread may be discussing what you are experiencing. If it is, add your own ideas to that thread. That topic is still alive.
I also need a lot more time to analyze other related things things that are happening, but when it's all said and done, I will be submitting several Feature Request to GPSoftware with a list of improvements to how and when Formats (and View Modes) are applied and which takes precedence. This will also include recommendations for how Lister Styles (and their Formats and View Modes) come into play. I intentionally take my time on such requests because I like to get a feel for how newer Opus users relate to the topic. So, please, participate in that thread and let your ideas be heard. You will surely learn some things along the way as well.