Center map between three markers via Basic Google Maps Placemarks [WordPress]

Question

1. How can I center map between three markers?

2. How can I range markers? When I print them like this:

   [bgmp-map placemark="27" zoom="15" width="730" height="250"]

   [bgmp-list]

   [bgmp-map placemark="92" zoom="15" width="730" height="250"]

   [bgmp-list]

   [bgmp-map placemark="96" zoom="15" width="730" height="250"]

   [bgmp-list]

they comes on the page in this order: 92 96 27. WHat can I do to show them in order 27 92 96?

Thanx a lot in advance!