A family of Microsoft presentation graphics products that offer tools for creating presentations and adding graphic effects like multimedia objects and special effects with text.
As John said, but also remember the golden rule of PowerPoint:
NEVER COPY A PLACEHOLDER!
If you copy (and paste) a placeholder the resulting object is a text box, not a placeholder. Text boxes in ppt can not handle the formatting of multi-level bulleted lists, so while it might look ok to start with, if you try to increase or decrease a paragraph's indent level (using tab or shift+tab), the bullet formatting will not change. You should use a layout with the required number of placeholders when constructing your slide.
So go to the slide master, and define the bullets in the placeholder in the Slide Master (which is right at the top of the thumbnail pane, above the Layouts associated with that Master).
Hope that helps.
Cheers
Rich