Open several instances of the update Form - session state handling problem

Hi,
I have a page with a classic report region on a database table and an other page that has an update form region for updating the records on the previous page. The application navigates from the page containing the classic reports region to the update page via the primary key link displayed in the reports region.
Users tend to open the multiple instances of the update form by right clicking in the browser the primary key links in the classic reports region. I couldn't pinpoint the problem yet, but I have 'data overwrite issues' i.e. records are updated with form item values that are entered in the other - concurrently opened - update forms.
Is this the 'normal' way of doing things? I think the problem is that APEX keeps track of only one single instance of any item on a page. If the same page is opened several times in the same browser, APEX updates the state of the page and items within with the one on the most recently opened page or submitted page.
Can I enable users to use the application as they are currently doing, i.e. by opening the update form several times in the same browser concurrently and still make APEX to handle this?
TIA,
Tamas

I would also argue that the amazon.com example is not entirely valid. Opening your products in multiple tabs and hitting "buy" on all of them sounds analogous to multiple "insert"s in our Oracle world...every item is probably not in your cart and so it's possible to stuff three new items into your cart with no conflicts.
The sticky issue is when you are editing existing data and I am not quite seeing Amazon as an example either of working in multiple windows.
I went to amazon.com and signed in. I did the following:
1. Home page came up with suggested items of children's books. I right-clicked on a book (book B) and opened it in a new window and clicked "add to cart". In my original window I clicked on a book (book A) and added it to my cart.
2. I closed the new window I had opened.
3. In the original window in which I was dealin with Book A, I clicked "View cart". It had books A and B in it. I didn't have a separate shopping cart for Book A and a separate shopping cart for Book B! Apex would do the same thing.
4. Now looking at my cart, I hit Ctrl + N and opened a duplicate window. In one window I changed the quantity on Book A to 2 and on the second window I changed the quantity on Book A to 3. When all was said and done, I still had ONE cart and Book A with 3 was the prevailing record. What is it that they would expect Apex to do with a similar situation?
What is it your users are doing in their amazon.com example that is theoretically different than what Apex supports?

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