This is interesting. According to this Troposheric ducting forecast page i found the night I rescanned I had very good conditions for ducting. According to the color chart on the map I was in the intense area surrounded by very intense and very strong. here is the map
http://www.dxinfocentre.com/tr_map/archive/3eam.jpg
http://www.dxinfocentre.com/tropo.html