i just did. Imported a magnet on the right thight.

Came in as default : Mag 1, Mag Zone1, Mag Base1
Renamed them to Legmag,  Legzone, Legmagbase in the properties palette.

Imported a second magnet on the same thight
Came in as default again: Mag 1, Mag Zone1, Mag Base1

The renaming is also in the hierarchy editor, or am I missing a point here somewhere?

In the cr2 :

magnetDeformerProp Mag 1:1
 {
 name    Legmag

magnetDeformerProp Mag 2:1
 {
 name    Mag 1

And a third magnet would get : if you did not rename the second magnet to something else!

magnetDeformerProp Mag 3:1
{
name Mag 2

Poser 1, 2, 3, 4, 5, 7, P8 and PPro2010, P9 and PP2012, P10 and PP2014 Game Dev
"Do not drive faster then your angel can fly"!