This seems to be the same symptoms as
#2616 which is closed, but someone added to that report in the last month.
When I upload a new file to the Downlpads area (i.e. not the hg repo) with the same name, I just download the old file back. Even if I delete the file and re-upload I get the old one.
Example: https://bitbucket.org/peterhull90/jumpman82/downloads The old file had size 4425 bytes, the newly uploaded one has 4435 bytes but I always get the old version.
Is there a delay in activating the new version? (in which case it may be OK by the time someone else sees this!)