Signature disappears when inserting documents to template - templates

Question

I'm trying to insert a word document into a Docusign template. The document inserts properly, but in addition to the two signers set up in the code, one of the signers that was on the template stays. Also, the second signature field is removed. Is there a setting that I'm missing? Here's my code:
List<TemplateRole> roleslist = new List<TemplateRole>();
TemplateRole InternalSignerRole = new TemplateRole(); // Set the Template Roles for the Internal Signer
InternalSignerRole.Email = _currentDocInfo.sInternalSignerEmail;
InternalSignerRole.Name = _currentDocInfo.sInternalSignerName;
InternalSignerRole.RoleName = "SignerInternal";
roleslist.Add(InternalSignerRole); // add to Template Roles list
TemplateRole ExternalSignerRole = new TemplateRole(); // Set the Template Roles for the External Signer
ExternalSignerRole.Email = _currentDocInfo.sExternalSignerEmail; //Create Template Roles for ExternalSigner
ExternalSignerRole.Name = _currentDocInfo.sExternalSignerEmail;
ExternalSignerRole.RoleName = "SignerExternal";
roleslist.Add(ExternalSignerRole);
var apiClient = new ApiClient(conn.Base_URL);
DocuSign.eSign.Client.Configuration.Default.ApiClient = apiClient;
DocuSign.eSign.Client.Configuration.Default.AddDefaultHeader("X-DocuSign-Authentication", authHeader);
string accountId = null;
// login call is available in the authentication api
var authApi = new AuthenticationApi();
var loginInfo = authApi.Login();
// parse the first account ID that is returned (user might belong to multiple accounts)
accountId = loginInfo.LoginAccounts[0].AccountId;
var baseUrl = loginInfo.LoginAccounts[0].BaseUrl;
var separator = new string[] { "/restapi" };
var basePath = baseUrl.Split(separator, StringSplitOptions.None)[0] + "/restapi";
apiClient = new ApiClient(basePath);
EnvelopeDefinition envDef = new EnvelopeDefinition();
envDef.EmailSubject = emailSubject;
envDef.EmailBlurb = emailBody;
//add custom fields you sent over with the document
envDef.CustomFields = letterCustomFields;
// Add a document to the envelope
envDef.Documents = letterDocs;
// Add a recipient to sign the document
envDef.TemplateRoles = roleslist;
envDef.TemplateId = "478d85c2-dc7c-4a89-a985-7d7a9101e36a";

Answer 1

First off, please don't use legacy authentication. That is old, not as secure and should not be used in new code that you're building.
Note that tabs (signature elements) are associated with both a recipient (a specific one) as well as a document (a specific one).
If you are trying to replace a document in a template, when creating an envelope from it (which is what you're doing, you're not replacing the document in the template, but rather in the envelope you create), you need to ensure the tabs refer to the same document and same recipient (based on the role).
Also, another recommendation is to use composite templates, which provide more flexibility for such scenarios. See excellent blog post by Gil Vincent for more information.