(not sure where to put this as it fits under 2 headings)
I am not sure infact if there is for sure a second season. But I do know that Negima was remade, why? I'm not really sure. The animation is different and the plot line is going by rather fast. I think that it is going by faster as they restarted it.
This Negima is the more serious version. The animation has matured and you find out about Eva's past way to early. Although this one can be funny it can not, in my eyes, serve up to the original which stayed more by the plot.