1. in Oklahoma the note and mortgage cannot be separated, but does that "cannot be separated" mean that it is not at all possible or that you can do it but if you do it then the note is no longer secured?
Correct - then the note is no longer secured by the property.
2. a "pay to the order of" indorsment on an Allonge is not an assignment, even though there was an assignment of Mortgage filed the assignment of Mortgage in itself does not convey the rights and ownership to the note,
Correct - an assignment is a document that recites the terms of a transaction in which the loan, note, obligation, mortgage or deed of trust is transferred and accepted by the assignee in exchange for consideration.
3. if they filed and assignment of mortgage but they did not do an "assignment" of the note they just shot themselves in the foot as long as i dont dispute the validity of the mortgage assignment? motion to dismiss in order perhaps?
Correct - if they didn't assign the note - then they don't have "standing" to foreclose.
Yes, a motion to dismiss would be in order.