WMS layer ordering and styling

Is it possible to adjust the odering of layers within a WMS? From what I can tell Essentials follows the order according to the GetCapabilities document and I can't find a way of changing this order from within Essentials. This is a problem as the WMS I'm wanting to use has older imagery ontop of more recent imagery. I'm using the following service http://wms.data.linz.govt.nz/5fe460f35f6b4768bb75980649dd7337/r/wms? with these layer masks /NZ Orthophotos 1994-1995, /NZ Orthophotos 1995-1996, /NZ Orthophotos 1996-1997, /NZ Orthophotos 1997-1998, /NZ Orthophotos 1998-1999, /NZ Orthophotos 1999-2000, /NZ Orthophotos 2000-2001, /NZ Orthophotos 2001-2002, /NZ Orthophotos 2002-2003, /NZ Orthophotos 2003-2004, /NZ Orthophotos 2004-2005, NZ Orthophotos 2005-2006 to pick out the specific layers I need but the ordering appears as per the image below.

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Second issue is around styling of a WFS\WMS. Using the following WFS service http://wfs.data.linz.govt.nz/5fe460f35f6b4768bb75980649dd7337/v/x1571/wfs? I seem to be stuck with the default WFS\WMS styling which is a black border and grey fill. I'd like the fill to be transparent so the layer can be used ontop of other layers\basemaps. Is there any way of overriding the default styling for the service within Essentials?

/customer/servlet/servlet.FileDownload?file=00P6000000em1ESEAY