Back when Season 1 was released, the cast on the page was arranged according to the credits. Now that Season 2 has begun being released you should probably arrange it in the format you see on most pages.
If it's exactly the same, then leave it be. If some of the credits are different between seasons it's better to arrange it in the format above. It was done with Fate/Apocrypha and Fate/Extra (in Extra's case credits were different for episodes 1-6 and 7-12).