Hi Maerick,
Thanks for using Syncfusion products.
1. I am not able to see the problem when I add ToolStripEx and VS2005 MenuStrip on the form. If you still see the problem, you can change the order by right clicking ToolStripEx in designer and select "Bring To Front".
2. I am not clear about the controls used in the (2) case. Are you using Syncfusion MainframebarManager and ToolStripEx?
3. You can add separator through designer in two ways - a) using SeparatorIndices editor b) just right on any barItem in designer and select "Begin a group" to insert a separator.
http://www2.syncfusion.com/ug_63/toolswin/AddingSeparators.htmlPlease let me know if I am missing anything.
Best Regards,
Mano