mauzeriz - If you continue to have problems we can help you much more directly if you start your own thread in the forum on the PokerTracker website, or open a support ticket there. Ongoing issues get lost in this type of thread.
Also, if you're using PT4 please post your questions in the PT4 section (this thread is about PT3).
1. Yes. The Hud will scale automatically as you resize the table, but if you want to resize the text in relation to the table you can do that in the Hud editor via Hud > Edit Hud Profiles. Select the stats you want to change (you can control-click or shift-click to select multiple stats), and change the font property.
Click the grey video icon in the bottom left corner to watch the tutorial video for more information.
2. The Hud should of course update as each hand is imported. Please open a
Support Ticket and one of our support technicians will work with you to find out what the problem is.
--WhiteRider