I just installed v2.53 (64 bit) on Win8.1, with mostly default settings (only changed the folder to save torrents).
I noticed the bandwidth limits don't work at all.

No matter what values I enter for UL and DL or if I turn each limit on or off, it makes no difference.

The download is at full wire speed, while upload is about 2500 bytes per sec.

The Windows Task manager confirms those numbers.

I'm 100% this worked fine before, when I used v2.51 in portable mode (now I have a regular installation).

It's me again.
Later I tried another torrent and there the limits work.

Maybe the problem happens only right after installation. Or is specific to some torrents.

you have both limits active, auto limit disabled, and it ignores numbers you set? are you using scheduler/channels etc?

I used mostly default settings.

I tried turning the limits on and off, also auto limit.
Nothing worked, the download was full wire speed, while upload was about 2500 byte/sec (there were only seeders, so the upload was mostly metadata - this also means that there was no proble with upload limit, as I never set the limit so low to affect the rate of 2-3 KB/s).