Please don't claim something that isn't correct. If you downloaded 12 files yesterday and 2 files today, but all 14 were within 24h then you'll hit the limit.
I've just reset the limit and logged into your account. An option which I don't like using unless there is extreme need for it.
And I was able to download exactly 14 files before I got the error.
I've rested the limit again after doing that so you'll see you'll be able to download 14 files from the point of your first download until 24h expires.
And to everyone else starting a similar thread please note that it will be deleted as it is already established that everything works exactly as it should. It is just that some people only consider Today-Yesterday time frame. And limit is per 24h, it doesn't matter when your first download is.
Do not forget read it: Attachment Download Limits