Ahh, you have two wow accounts? In that case, you should also have two different Censusplus.lua files, one for each account. That would explain why you sometimes have no updates showing, if you always upload the same one; any updates you gather on your other account will not be in that file.
No matter the operating system, WoW's files are laid out the same once you reach the WTF folder, which I can tell from your post you have found.
WTF > Account >
{accountname} > SavedVariables > Censusplus.lua
The accountname bit is key; under each of your accounts, there will be a different Censusplus.lua - you'll need to upload both to get the data from both accounts. I have two myself; it's a nuisance to have to remember to do both, but it's the only way it can work - all data is saved by account, and not across all accounts, so it can't be helped.
By the way; when uploading both files, you need to leave a few minutes between them, or the website will only process the second one; the interval used to be 15 minutes, I think it's lower now, but just something to be aware of. I think that was added in due to too many uploads overloading the system or something, years back, can't remember the exact reasoning but I know it's still in place to some extent as I occasionally mess up
