Order of the VPN connections in the VPN menu
Rename them ;).  They are ordered alphabetically.  If you put a white space (edit: or any other name that precedes in the alphanumeric order) in front of the second VPN's name in System Preferences > Network (by selecting the VPN Service and clicking on the cog symbol below the services: click "Rename Service..."), then un-tick and re-tick "Show VPN status in menu bar", the order will change.