I'm running PM 5 on a Macbook Air, OSX 10.10.5.
For a recent project I needed to repurpose my images for a different venue and wanted to rename them and remove all the captions, tags, headlines, descriptions, etc. I renamed them in the IPCT form/page, removed all the captions and identifiers. But when I uploaded the renamed images to Flickr (images were renamed to show only a 4-digit file number), the original long filename and and all the deleted headlines, descriptions, etc. were all still there. I tried a few times to no avail. I can't even find a place in the IPCT form where the original name resides to remove it (in addition to renaming it).
I then took the same files into Lightroom and from its Metadata window I was able to remove the "Title" which is a separate category from the filename -- something I don't't see in PM. I also was able to delete the captions, tags, and headlines from there.
Why couldn't I do this in PM? I wasted so much time resetting everything, only to have all of it pop back up again. I know I'm going to come across this issue again. Please let me know that this is doable and how to do it.