Limit to Number of Form Elements?

Hi:
I've created a HTML form using PL/SQL. The form display existing rows in a table, as well as a blank row for a new entry. The user can enter and update records through this HTML form. The form submits with the GET method and calls a PL/SQL package that inserts and updates as necessary.
The user can enters 86 records without a problem. They can modify any and all of these records.
The user then adds record 87. That is they enter the data and submit the form. The record is commited to the database.
The problem: if the user trys the modify the 87th or any other record after adding the 87th, we get a 400 Bad Request response.
Has anyone seen this strange behavior? Is there some html forms limit that I'm hitting?
I've searched all day, and I have no leads. ANY suggestions are appreciated.

Pedro:
Thanks for the response. I'm not sure it's the code for these reasons:
1. I can insert and update up to the 86th record.
2. I can enter the 87th record
3. When I try to update any record after entering the 87th record, I receive the 400 Bad Request response.
From what I can tell this 400 Bad Request is a response from the Web server and that my code is not being executed.
If you still want to see the code, I'll post it.

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