Okay, I follow - and I can confirm that I get the same results. So yet another example to throw into the pot !

# File 'TheCube.obj'
# Blender v2.77 (sub 0) OBJ File: ''
# www.blender.org
o Cube
v 0.100000 -0.100000 -0.100000
v 0.100000 -0.100000 0.100000
v -0.100000 -0.100000 0.100000
v -0.100000 -0.100000 -0.100000
v 0.100000 0.100000 -0.100000
v 0.100000 0.100000 0.100000
v -0.100000 0.100000 0.100000
v -0.100000 0.100000 -0.100000
s off
f 1 2 3 4
f 5 8 7 6
f 1 5 6 2
f 2 6 7 3
f 3 7 8 4
f 5 1 4 8

PP2014(32bit) default scene, deleted Andy, imported TheCube.obj

External Name = TheCube (Internal Name = TheCube)

'When you import an object file, it imports with the name exactly the same as the saved object file.' - confirmed.

Saved this prop as 'TheCube.pp2'

{
version
    {
    number 10
    }
prop TheCube
    {
    geomCustom 
        { 
        ...
        } 
    }
prop TheCube
    {
    name    TheCube

Started a new scene, deleted Andy, loaded 'TheCube.pp2' three times

External Name = TheCube_1 (Internal Name = TheCube)
External Name = TheCube_2 (Internal Name = TheCube 1)
External Name = TheCube_3 (Internal Name = TheCube 2)

---

The 3Dcheapskate* occasionally posts sensible stuff. Usually by accident. And it usually uses Poser 11, with units set to inches. Except when it's using Poser 6 or PP2014, or when its units are set to PNU or something else.
*soon only to be available in two flavours -  DAZ and Renderosity