Physics faster than light question

When studying the signals from GPS you distinguise betwean the carriear fase and the code of the signal.

You have a disturbance from the atmosphere. In the Troposphere you have a delay of the signal.

In the jonossphere there happens one thing that is rather strange. The carrier phase will be faster in a way that seems to be faster than light, but the code will be slower in about the same magnintude.

I find two things rather strange about this.

1 If the carrier moves up to a higher speed than the light, then you contradict the relative theory.

2 How can the code move in another speed than the carrier, the code is phase modulated on the carrier and so to say build up by the carrier, it feels a bit aquard that they are separated.

I haven´t read so muh about signal theory and I guess the answer is in that field. Perhaps it has to to do with the differential equtaion for the movement of the electromagnetic signal, GAUSS construction if I remember right. Perhaps the avareage betwean the code and the carrier are what should be considered as the speed of the signal. I do not know.

What seems to happen with the carrier is that in the jonospere there are free electrones and those electrones will make the electromagnetic wave move freer and as such it will have a longer waveleanth and then if the frequency is unchanged the speed will be faster than the original speed of light.

But there are something I do not understund in this question, or somewhere I think wrong.

SD