Layout problem width of transparent container

Hello,

I have a webdynpro with 3 transparent containers in matrix layout. All of them have width 100% and MatrixheadData.

The first one has a group and some text fields.

The second one has a group and the group some transparent containers.

The third one only has a textfield.

The third container is the widest, than comes the first one, the second one is the narrowst. The difference is only 1 or 2mm but it looks very unprofessional. I expected all three to have the some width.

regards

stefan