QGC1 control chart selection

Hello,

I would like to select control chart through QGC1 transaction, I only need to select one control chart by the control chart number, as there is no selection field in main selection screen, I used dynamic selections to enter control chart number as selection condition, but it seems system would not consider the restriction in dynamic selections, it selected more than one control charts finally.

Can anyone help me understanding why this happened? How can I select only one control chart by control chart number?

Thanks a lot.

Benny