Do not worry .. many people have done that. It is IRCC's fault that they made a form with technical bug, they should accept it. You did what you could have done the best.Now i am worried because we signed it manually and uploaded the file . I didn't thought about buying that free Adobe and sign it :/
And also, may be what you have done is the correct way to do. May be what I am doing is not or also is one way to do it correctly. Now you have submit it do not think too much.