Magellan Markers do not support spaces period - you are lucky it works in any browser.
Magic Markers work exactly the same as the Magellan Markers except that you have, in addition to the marker id (no spaces etc), the Menu Text setting - this is the text that will get displayed in the MaglicGellan menu when it is set to Auto generate. I’m not sure whether you have it on auto but you should do.
In addition, the Magic Markers have a setting to enable a drop zone. With this you can put the content for that markers section inside the marker stack itself - the only advantage of this is that you can move page content around in blocks and the menu (when on auto) will adjust to reflect the revised order without messing around with the menu code. It is what it says - totally automatic.
The only other setting in Magic Markers is the offset control. This allows you to “nudge” the landing position of that marker up or down. This can be useful to avoid content going under the menu bar or simply to fine tune the appearance. It is all described on the demo site page which is also available to download from the main BWD site.