What's going on in Germany right now?

[freek]

Or unless they get more districts that what belongs to them by PR, although this doesn´t happen so often.

Actually, it happens quite a lot, especially since 1990, that CDU, and SPD get more districts than their total of seats allocated in PR. The solution is to extend the number of seats in the Bundestag, socalled "Uberhangmandate" (overhang seats).

[freek]

There is also a way to avoid the change in the number of seats (I honestly don´t remember how). It´s useful in cases where (e.g., bc the constitution doesn´t allow it) you can´t change the number of seats.

That would be very handy, since in Holland politicians all of a sudden want to change the electoral system. It works fine since 1918, but now they think that they lost the connection with the voters, so they want some districts. But the constitution says that elections have to be performed with a system of PR, and that the parliament has 150 seats, so they seem to settle for the German system, but they need some adjustments.