PostgreSQL client overwritten during pkg_add

Hello pkg_people,

A spot of trouble in paradise during my daily battles in the trenches.

I was the happy user of:
   postgresql81-client-8.1.4 PostgreSQL database client programs

I needed:
   php5-pgsql-5.1.5    PHP extension for PostgreSQL databases

Which in turn installed its dependency:
   postgresql80-client-8.0.8 PostgreSQL database client programs

Which resulted in client-8.0 overwriting parts of client-8-1:
   pkg_add: Overwriting [snip] - pkg postgresql81-client-8.1.4 
bogus/conflicting?

My questions:
  1) Is this just plain expected behaviour?
  2) Not expected, so I should file a pr - but against what?
   2a) php5-pgsql - should update dependency?
   2b) client-8.0 - should fail gracefully?
   2c) client-8.1 - not registered correctly as a predessor of client-8.0?
   2d) ... ?

As you can see from the above I am not the one to supply a diff :-)

Kind Regards,
Claus Andersen