No, I have the 63Mbps, the other one is 35Mbps. BUT, as you can see in the screenshot I've attached here, the minimum guarantee for my package (the highest one) is 55Mbps which is why I think it looks really coincidental when since day one it seems to have locked to their MINIMUM guarantee... I don't know seems really fishy... Even though the estimation for my location is 66 minimum.
Nope.
A 55Mb product cap would be 54,999.
Your 55,399 sync is a 55.4Mb cap/banding applied by the OpenReach DLM and has nothing to do with the ISP.
That is unless it's the ISP's supplied hardware that has been resyncing over and over.
Even multiple resyncs during the setup process of your ISP supplied hub/modem can leave a line banded before a byte is downloaded.
It wasn't banded when activated though.