Conversation_handle In Queue Doesn't Match SEND ON CONVERSATION... Value.

When examining the "conversation_handle" column value in the Queue (from: "select * from ProcessQueue"), I find the value of the conversation_handle appears to be different from the "conversation handle" ("SEND ON CONVERSATION @conversationHandle...") on which the message was sent.

I'm trying to gather all messages for a given Dialog conversation, but am not able to do this because the conversation_handle doesn't appear consistent between messages in the Dialog.

note: the conversation_handle of "BEGIN CONVERSATION TIMER (@conversationHandle)..." message does appear to be correct in the Queue.

Thoughts on why the conversation_handle listed in the Queue might be different than that of the
"SEND ON CONVERSATION @conversationHandle..." command that sends the message?

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ALTER PROCEDURE [dbo].[SendMessageStoredProcedure]
AS

-- Declare Conversation Handle
DECLARE @conversationHandle uniqueidentifier;

-- Declare Message
DECLARE @message nvarchar(max);

-- Begin Transaction
BEGIN TRANSACTION;

-- Begin Dialog from Service1 to Service2 on Contract
BEGIN DIALOG @conversationHandle
FROM SERVICE ExecuteProcess
TO SERVICE 'ExecuteProcess'
ON CONTRACT Process;

---
--- FROM DEBUGGER: @conversationHandle has value of AC8DF4E0-9F38-DB11-96A2-000CF1D46448
---

-- Set Message value
DECLARE @requestDocument xml
SET @requestDocument = N'<ProcessRequestMessage/>';

-- Start Converstation time
BEGIN CONVERSATION TIMER (@conversationHandle) TIMEOUT = @queueSeconds;

-- Send Message
SEND ON CONVERSATION @conversationHandle MESSAGE TYPE ProcessRequest (@requestDocument);

-- Commit Transaction
COMMIT TRANSACTION;

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RESULTS OF: select * from ProcessQueue;

status priorty q_order conversation_group_id conversation_handle msg_s_# service_name ser_id srv_cont_name ...
1 0 1 AD8DF4E0-9F38-DB11-96A2-000CF1D46448 AC8DF4E0-9F38-DB11-96A2-000CF1D46448 -2 ExecuteProcess 65536 Process 65536 http://schemas.microsoft.com/SQL/ServiceBroker/DialogTimer 5 E NULL
1 0 0 AE8DF4E0-9F38-DB11-96A2-000CF1D46448 AF8DF4E0-9F38-DB11-96A2-000CF1D46448 0 ExecuteProcess 65536 Process 65536 ProcessRequest 65536 X 0xFFFE3C004400610074006100620...