It's a limitation of the readscript() command used in Daz's Injection process. It's an old command, and it will always apply its injection to the first figure loaded in a new scene (note not a figure named "Figure 1", but the very first chronological figure in the scene). There is a way around it, but requires some extensive editing of the Daz inj files themselves. Do a search on FII or Figure Independent Injection in Poser Tech forum. There was work going on to provide FII capability on-the-fly, but the release of P6 has caused it to be back-burnered for a while :-(