First of all in the /lib/skins/ObsessBlue/pirep_viewreport.tpl you need to make sure that you have the <div class="mcright"> on top and </div> on bottom to close it.
to get the map to fit you need to go into /core/local.config.php find this text # Google Map Options
this is what i set it too and looks ok for me
Config::Set('MAP_WIDTH', '600px');
Config::Set('MAP_HEIGHT', '600px');