Signer appears twice using compositeTemplates

Question

We've been sending compositeTemplates via the API for a while but hit a new issue recently when we started using a new template. Here's the compositeTemplates part of the request:

private void SetStartup(){
    Microsoft.Win32.RegistryKey key;
    key = Microsoft.Win32.Registry.CurrentUser.CreateSubKey(@"SOFTWARE\Microsoft\Windows\CurrentVersion\Run");
    key.SetValue(AppName, Application.ExecutablePath.ToString());
    string ApplicationPath = "\"" + Application.ExecutablePath.ToString() + "\" -minimized";
    key.SetValue("MyApplicationName", ApplicationPath);
    key.Close();
}

The resulting envelope has the recipient tag twice, one for each template:

[
    {
        "compositeTemplateId"=>"1",
        "serverTemplates"=>[
            {
                "sequence"=>"1",
                "templateId"=>"4f01d07d-9362-4651-8bef-dccc5dbef03c"
            }
        ],
        "document"=>{
            "name"=>"test1.pdf",
            "documentId"=>"1"
        },
        "inlineTemplates"=>[
            {
                "sequence"=>"1",
                "recipients"=>{
                    "signers"=>[
                        {
                            : name=>"Test Test",
                            : first_name=>"test",
                            : email=>"test@test.com",
                            : roleName=>"Client",
                            : clientUserId=>1,
                            : recipientId=>1,
                            : routingOrder=>1
                        }
                    ]
                }
            }
        ]
    },
    {
        "compositeTemplateId"=>"2",
        "serverTemplates"=>[
            {
                "sequence"=>"2",
                "templateId"=>"0F0DA764-3A4D-42EF-BC0E-1386487971C7"
            }
        ],
        "document"=>{
            "name"=>"test2.pdf",
            "documentId"=>"1"
        },
        "inlineTemplates"=>[
            {
                "sequence"=>"2",
                "recipients"=>{
                    "signers"=>[
                        {
                            : name=>"Test Test",
                            : first_name=>"test",
                            : email=>"test@test.com",
                            : roleName=>"Client",
                            : clientUserId=>1,
                            : recipientId=>1,
                            : routingOrder=>1
                        }
                    ]
                }
            }
        ]
    }
]

Both templates have the signer at RoutingOrder 10 and RecipientID 2. I have tried different combinations of recipientId and routingOrder but nothing works. Also, I can't modify these templates.