Well no,it isn't happening often.

But I've been thinking and maybe it has something to do with the time the incomplete files are kept. It's supposed to be old incomplete files, but what do they mean by that? And since I've started downloading this file more than a month ago...

I've changed the setting but I suppose it will take a long time before I can confirm my theory so: what do you think?

Thanks for helping me, and "peace"!