My understanding is that the ILS can only be "up" for one direction of the runway at a time. So, if it is up for runway 28, it must be taken down in order to have it up for runway 10, but both can not be operating at the same time. In order for KLM to come straight in, they needed to switch so they would be able to land with as little flying time and fuel as possible. I'm sure someone will be clarify this some, but there's a starting point for now.