The above is also what happened on one of my recent double posts. When I clicked "quick reply" it took me to "Go Advanced". I assumed that I had accidentally hit the advanced button and clicked the post icon. It was a double post. That was from an iPad on cable wifi. Since, I've had several posts that kind of freeze up and take a rather lengthy period to process the post. Luck with trying to trouble shoot the cause and once again, Thanks for all your efforts!!!
Regards,
Howard