I've made some pretty substantial changes to the alpha sheets behind the scenes, and to the Pathfinder [Legacy] sheet in particular. Please try clearing your browser cache, or post in the Experimental Features forum if there are any issues!
At this point, we highly recommend that all new Pathfinder sheets be created in the alpha and that existing Pathfinder sheets be copied into it via the 'Copy to Sheets Alpha' link in your regular sheet list
Alternatively, I prefer how savage species does it, breaking down all monster HD and LA in one-level packages. Even better would be to make your own monster levels where you spread out the abilities over more HD, but you have no levels without HD, so HD = lvl.