I tried setting it to address 65 and it did the same thing. I have not tried one light one cable with address 49. I wiped the ipad, updated the operating system , removed the app and re installed. I also tried the other modes 16 ch 18 ch 22 ch. with varying degrees of success.
It seems that when I take manual control in the fixture sliders menu, some of the sliders do things other than their labeling. perhaps a firmware update on the fixtures is needed?