Issue while reading Raw Request in SOAPUI from "${=Math.random()}" or ${=java.util.UUID.randomUUID()} for Rest API Post Method

I was trying to read a Raw request from REST API Post request using

 "${=Math.random()}" or ${=java.util.UUID.randomUUID()} 

and trying to store the generated value in Project level property but    
to when i see raw request and stored value in the Project level   
property is different.

Here the problem is i am able to see one value in Raw request and   
different value is storing in Project level property. Please let me know 
why it is giving like this, is that function executing twice?

Regards,
SaikiranGarapati.