Sequence Diagram messages move down too far

I am working on a sequence diagram and trying to adjust the layout to be more compact. I have auto layout activated and absolute values set as described in a help document. However, when I try to move a message up the lifeline to close an empty space (it is not positioned properly by auto layout) the message and all following messages automatically move further down the page…

Any suggestions?

Hi 2250lou,

Thanks for your post. Would you mind to send me a sample project and tell me the detailed steps to repeat the problem? Thanks in advance!

Best regards,
Lilian Wong