Ok, just posted another article and guess what... my Post Bandwidth suddenly got to 10,000 on steemd.com and your tool of course has updated the result it was returning saying I can post 3 more times today!
The conclusion is that apparently steemd.com uses some sort of caching algorithm and if your tools uses data from steemd.com that it also reads that cache and in turn may report false information making users confused as what is wrong like in my case.
The interesting thing is that apparently not everything on steemd is being cached, probably just some parameters as other information seems to be regularly updated... I have noticed that sometimes my Voting Power is stuck at some value for a bit until it updates to a new value, but did not expect that the same thing happens for Post Bandwidth as well.
Thanks for running this experiment, @cryptos. I really appreciate it.