There is likely a limit to the amount of channels that can be displayed on home page .They would still be saved to favourites in categories
Just guessing though
While in live tv hit the menu button. Post the info at the bottom
Is the time correct on your buzz? timezone set properly,
Also there is an epg time offset in menu configurstion
Clearing data is not necessary for proper function.
I have every buzz on the market and only ever had to do it once on a buzz 3000
Maybe you need to hit the home button twice quickly?