I wanted as many temp files as possible to be directed to a folder on a second drive. That part went very well.
I also wanted CCleaner to delete the files in these "extra" temp areas. So I went to options, then include and that is the area to select additional files and folders you want CCleaner to remove. It was a snap to set up but I will spare you the details of the hours of troubleshooting I've been through.
I didn't want these files to be deleted right away so I took the option to not delete anything less than 24 hours old, and the program deleted nothing. I lower the time to 12, 6, 3, and finally 1 hour. The data gleamed from this was chaos at best. In this temp folder there are a number of sub-folders and around 300 files. Most of these files are more than a day old, to say nothing of 12 or 6 or 1 hour. I think the most it could find was 12 files. Why it picked those files I do not know. There were some in there which were years old. There were all sorts of file types in this area, tmps, exes, jpgs, ect. When I finally gave up on using the time option and the program found 278.
My conclusion is that there is a bug in your program!