In user/i/notification/add == "My Account" -> "Notifications" -> "Add Suscription"
When creating ANY suscrption type (author, thread, node type, tag) the drop down selector for "Send Method" only shows 3 options:
Mime Mail
HTML Mail
Web

However, in the suscriptions by type summary in user/i/notifications/author == "My Account" -> "Notifications" -> "Author" (or nodetype, or tag, or thread) the user can see all the available options in my site:
Mime Mail
HTML Mail
Web
SMS
Twitter Direct Message
Twitter @ Message

I wonder if this issue should be posted in "SMS framework" and "Twitter" rather than here ¿?. Please advice.