"Please enter your password than press pound" issue

Not sure if someone can help me here. So I freebies and learning a2billing to setup a calling card platform. My requirement is
I will get for example 1 DID number. and mapped multiple user to that DID so that A2billing can detect the caller ID and forward the call according to e destination setup for that caller ID

So I have 2 customer (100), (200) and I setup the caller ID so that A2billing does not ask for pin number. This part working great no issue.

Now I am setting up the auto forwarding DID number to a destination.

I have created a DID number which I added in INBOUND DID–>Add…Search. For example the DID number is 1111111111
DID CUSTOMER BILLING …

111111111 BLANK Dial…

And I added the first destination :

DESTINATION 8888888888
CUSTOMER ID 100
DID 111111111
ACTIVATED Yes
VALIDATED Velidated
PRIORITY 1
VOIP_CALL No

And I added the second destination :

DESTINATION 99999999
CUSTOMER ID 200
DID 111111111
ACTIVATED Yes
VALIDATED Velidated
PRIORITY 1
VOIP_CALL No

So my understanding is, if I call from Customer 100 to the DID number, A2billing will see that the caller ID is 100 so the call will forward to 8888888888 and if I call from customer 200, A2billing will see the caller ID is 200 so the call will forward to 9999999999

Now when I am calling from number 100 to the DID, it dials 888888888. No issue. Everything is great.
Now when I am calling from number 200 to the DID, it rings 2 times and I am getting “Please enter your password than press pound”

So I went back to see INBOUND DID–>Add…Search and found that A2billing register customer 100 for that DID automatically because at first I called from 100. I can see

DID CUSTOMER BILLING …

111111111 100 Dial…

What should I do now ? Please HELP!!!