I know, I thought it was numeric/alphabetically, but then they started changing on me.  :)  SO I just only use one tab at the moment.  It would be better if the tabs were set in stone.  Tab 1, 2, 3, etc.  Then you put whatever you want in each one and it compiles from 1 to 10.  If you could name them whatever you want would be needed as well, but keep the order.