yes that annoying first page error the "mpcs.download" thing is metro pcs's web trying to access your device.. the "user-defined" home page fixed it for me... the way u have it is some times metro's web will log your phone (very rarely but every once in a while) and most of the time it will error out and simply hitting home or searching a new site will work.. if the way I said didnt fix it for you sorry
I dont no another way around it.