I did some reading about Monarchs, and apparently there are 3 different species. I also found a pdf research article that was 132 pages (didn't have time to read it and lost it in my favorites) long which discussed wing spans and migration to the Caribbean and Cuba.
My guess is that some of the monarchs are over wintering in Florida near the Keys.

like Treefrogs hypothesis.
I did see a few headed West and they were much larger than the big migration I saw along the dunes headed East.
Here are some interesting links:
http://www.livemonarch.com/monarch-facts.htm
University of Florida
Monarch Watch - A Collection of Resources.
I am tempted to e-mail one of these organizations and ask why we see so many going East, what they are doing etc.
Inquiring minds want to know.
I have become a Monarch papparazzi.
I read they will stay along the food souces during migration, so it only makes sense that they would go West and fly into Mexico through Texas in lieu of crossing the Gulf from the tip of Florida. Besides, all the migration charts show them Headed South and Westerly.

if anyone has finds out more info, let us know.
