Thanks to Europe Direct, I was able to find this Council decision and understand what the hell is going on with the Spanish Council Presidency and van Rompuy:
Declaration of the European Council
Treaty of Lisbon – Transitional measures concerning the Presidency of the European Council and the Presidency of the Foreign Affairs Council
In the event that the Treaty of Lisbon enters into force at a date when a six-monthly Presidency of the Council has already begun, the European Council agrees that, as a matter of transition, in order to take into account the preparatory work and ensure harmonious continuity of work:
− the competent authorities of the Member State holding the six-monthly Presidency of
the Council at that time will continue to chair all the remaining meetings of the Council and the European Council, as well as third-country meetings, until the end of the period of office;
− the following six-monthly Presidency of the Council will be in charge of taking the necessary specific measures relating to the organisational and material aspects of the Presidency of the European Council and of the Foreign Affairs Council during its period of office, in conformity with the Treaty. On these issues, close consultation will be established between this Presidency and the President (elect) of the European Council and the High Representative (designate) of the Union for Foreign Affairs and Security Policy.