charge rate

I have previously charged at my local charge point from 15% to 50% in 35 mins, yet yesterday I put my Zoe on charge at the same point at about 30% and only appeared to be getting a 15 kW charge. Should the charge rate been more that 15kW?

Does the leaf show the"actual" charging rate the car is pulling in live? I can only see on the battery screen choices for estimated charge time based on a manual selection from 3,6 or 50kw. I'm interested to see what my local public post can supply on the dashboard. Or, do I need leaf spy for...