EDIT: Selecting the FLIP Y checkbox in the SuperStar Import window fixed the vertical offset issue of the morphs... DUH. On some sequences the images are flipped, though 
The last couple of days I've been importing several Superstar Megatree sequences from Holidaysequences.com. Where xLights creates picture effects, everything seems to be in the correct location. But here are some issues I'm seeing consistently:
1.) Morph effects are located incorrectly on the Y axis. If a morph is supposed to be at the top of the tree, it actually imports at the bottom of the tree. It's almost as if the Y axis imports are flipped vertically.
2.) Fan effects have the same vertical placement issue. They are opposite the Y axis from where they are supposed to be.3.) Effects that are designated twinkle in Superstar are created as a solid white image in xLights.
4.) Very fast morphs from left-to-right or right-to-left will get treated as an ON effect in xLights with a quick fade.
I have looked at other people's videos online where they converted these same sequences and notice that everybody is having the same issue (whether they noticed or not).
I can make a video tonight showing some examples if that would help. I have several more of these sequences to import and it would be much faster if I could correct the Y axis issue at import as opposed to moving all the effects individually in xLights.
If it helps, I've tried this on two Windows computers. One is Windows 7 and the other is Windows 10. I've tried these imports on xLights versions 2016.32 through 2016.45 with the same results.