Hi, Mathias from TibiaMaps.io here! We automatically update our downloads multiple times per year to prepare for the Orcsoberfest and Winterlight Solstice events. So, one way to separate the markers is to not bother doing anything special yourself, and instead simply reinstall the TibiaMaps.io maps+markers every now and then. The easiest way to do that is by running the installer, but we offer guides for manual installation as well. I really wish CipSoft would have put these two islands in distinct locations :(