What are you actually selecting in the Insert menu? It sounds like you're
attempting to use something other than the 'Slides From' command. If you use
Insert> Slides From> Other Presentation you should not have that type of
problem... Although I'm not really sure what "layers the information" means.
Make sure to choose the 'Select slides to insert' option in the "Choose a
File" dialog unless you want all slides inserted "as is" from the source
file. The 'select' option allows you to do just that - pick any one or more.
If this isn't the solution you need you'll have to be more descriptive of
exactly what you're doing, what you expect & what happens as a result.
HTH |:>)
Bob Jones
[MVP] Office:Mac