Map plot overlaying frame

Hi, I am plotting a map, but the plot overlays the frame:

I have tried setting the 'Layer' property to both 'top' and 'bottom', but it does nothing. Any other ideas? I guess alternatively I could move the position of the plot within the frame to be more central, but I don't know how to do this.

The code I am using to set up my map is:

fob = figure;
%mollweid eqacylin behrmann robinson
h=axesm('MapProjection','behrmann','MapLatLimit',latlim,'MapLonLimit',lonlim,'Frame','on','FLineWidth',6,'Grid','off','MLineLocation',2,'meridianlabel','on','PLineLocation',2,'parallellabel','on','fontsize',26);
set(gcf,'PaperOrientation','portrait','Color','w','Position',get(0,'Screensize'),'PaperPositionMode','auto','Renderer','painters')
set(gca,'box','off','Visible','off','Layer','top');

Any advice would be gratefully received. Sally