Update to this thread:
Overview of this is ive not checked on the state as to why my downloads would not work and wondered why I kept getting the errors as stated in my previous posts. Well its been several weeks since I attempted to upload ANY file using the download system, so a few days ago, I thought that I would attempt it again.
To my amazement, it worked! Ive not made any changes at all since I opened this topic, YET - ive uploaded 3 files and they are now fully visible and downloadable in the section. I honestly dont know what has changed between when this occurred and now but it seems to have sorted itself out. I did at one point, sent a support ticket to my host as it was thought it was something to do with conf settings their end. I didnt get a reply from them at all, so assumed that they did nothing their end to sort this out, and still assume they havent made any changes but the system is now fully functioning for me now.
Im gonna set this topic as "Resolved" now!