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Can you share the form?  Also what version of AEM are you using?

Is this jee or stadalone?

This isn't a supported platform for es4Adobe LiveCycle ES4 supported platforms guide

I've recreated the issue and it's understandable why it's working the way it is but can understand the confusion with clicking twice.  I'll raise it with engineering and see if there is anything we can do

Server url: http://myserverPort: 8080HTML Preview Context: lc/content/xfaforms/profiles/default.htmlForms Manager Context: lc/fm <- I believe you have this incorrect

Have you followed the instructions listed here? Adobe Experience Manager Help | Generate HTML5 preview of an XDP form

Once you have deployed the AEM Forms addon into AEM using package manager you can go to http://localhost:4502/aem/forms.html/content/dam/formsanddocuments this will allow you to import your XFA forms one at a time or if it's easier for you zip up the XFA forms and upload the zip.  You can use the fo...

Why would the request be the responsibilty of AEM?  AEM would be passing the assertion over to the SAML server that should be able to log the request

Are you generating a PDF or HTML response DOR?  If html are you asking for the original documents to be attached?