question about different query results with wildcard

Hi, I'm working with a third party app on SQL Server 2000, and from what I can gather, programmed in C# & VisualFoxPro.

When we search with
    Note contains 94949
we get 571 results, when we search with
    Note contains 94949*
we get 575 results.

There should be at least a hundred different entries that start with "94949-1" so I expected the query with the wildcard to return something like 680 results, not an additional four rows.

Searching with
    Note contains 94949-1*
got 483 results
    Note contains 94949-10*
got 0 results
   

Could someone explain or point me to more documentation on the difference results we get?
Thanks