Incorrect CRM form

Hi,

For Contact entity,I have created a new custom attribute(DateTime) as "Delivery Date"

I want to make contact inactive if "Delivery Date" is in future.

Now I wrote a synchronous workflow which checks the "Delivery Date" and make contact record as inactive.

But the problem is If I create a new contact having future "Delivery Date" and click save,contact has been created and it is inactive but now the form type is 2(UPDATE) and Read only/Inactive which leads to incorrect behaviour for my onload scripts.But if I refresh form,the form type is 2.From end user point of view he cannot refresh page everytime.

Is there any way to fix this bug?