Conforming clothing is limited in terms of the morphs that the designer put into it. If s/he didn't put in, say, the implants morph, then the clothing cannot track this morph.

The first step is to be sure the clothing morphs are adjusted the same way as the character. To do this, select Victoria, making sure you have her whole body and not just a part... then hold down the control key and press "c" at the same time. Now select the dress, making sure you have the body and not a part, press control and add "v". This transfers all of Victoria's body settings to the dress. If this doesn't solve your problems, then you have a missing morph.

You don't say what version of Poser you are using. If it's 8 or better, you can use wardrobe wizard to transfer the morphs into the clothing, or you can use the stand-alone utility Morcloth to do the job.

Hope this helps. If it doesn't ask for clarification. I or someone here will be happy to help.