I don't think that procedure is exactly correct. Let's say you have a sales data table, with these fields:
Autonum
Name
Date
Amount
If you want to find the last entered sale of any particular person, and are going to use the autonum field MAX to do that, you must omit the Date and Amount fields from your query. Otherwise, Access finds that last of each unique entry and may very well show you all sales.
I don't know how to get it to show you the entire record in, let's say, a report... but I sure wish I did.