I had a heads-up that there might be a problem the other day too because I needed to export at 85% quality, but it kept exporting at 100%.
I'm skeptical that a human viewing the results could determine this is what is happening. How did you determine this?
Finally, I just opened the files in Photoshop and exported from there to get the size I needed.
Aha! Quality and file size are not directly related to one another. What are your exact requirements?
You can check the properties of the file to see all kinds of information. My exact requirements are that the exported file have the attributes applied to it that are indicated in my export settings. When I uncheck the box that says "rename file to xyz_filename", but all of the files are saved as xyz_filename, then clearly LR is not applying the settings that I have selected.
I don't see any relationship between file naming and quality of the export. Your problem description is extremely confusing.
then clearly LR is not applying the settings that I have selected.
You have not explained the reasoning that leads you to make this statement.
Could you please post a screen shot of your settings? Could you also state your OS an Lr version?
My experience shows, that Lr respects the settings of the export screen. I, however, sometimes choose the wrong presets.