Whoops I forgot to include the actual solution...
change from line 373 in RCCWP_Menu.php
if($panel->single == 1){ //if the page is single
if($add_post){ //if the page is single and don't have any related post
add_submenu_page('post-new.php', __($panel->name), __($panel->name), $requiredPagesCap, 'page-new.php?custom-write-panel-id=' . $panel->id);
}else{
add_submenu_page('post-new.php',__($panel->name),__($panel->name),8,'page.php?action=edit&post='.$has_posts);
}
}else{
add_submenu_page('post-new.php', __($panel->name), __($panel->name), $requiredPagesCap, 'page-new.php?custom-write-panel-id=' . $panel->id);
add_submenu_page('edit.php', __($panel->name), __($panel->name), $requiredPagesCap, 'edit-pages.php?filter-posts=1&custom-write-panel-id=' . $panel->id);
}
to:
if($panel->single == 1){ //if the page is single
if($add_post){ //if the page is single and don't have any related post
add_submenu_page('post-new.php', __($panel->name), __($panel->name), $requiredPagesCap, 'post.php?post_type=page&custom-write-panel-id=' . $panel->id);
}else{
add_submenu_page('post-new.php',__($panel->name),__($panel->name),8,'edit.php?post_type=page&post='.$has_posts);
}
}else{
add_submenu_page('post-new.php', __($panel->name), __($panel->name), $requiredPagesCap, 'page-new.php?custom-write-panel-id=' . $panel->id);
add_submenu_page('edit.php', __($panel->name), __($panel->name), $requiredPagesCap, 'edit-pages.php?filter-posts=1&custom-write-panel-id=' . $panel->id);
}