Dual Layer Split not working! & Files are bigger in encore???

Hi guys! New to the whole forum thing but was wondering if you could help me out:

I have two problems mainly..

1. When i right click properties on my video files in windows they show 4.2GB but when imported into encore and i build projects.. it says over the limit! Could the menus be taking that much space?

2. So after that problem i tried to resolve it by burning onto a DL disk but sure enough my luck wasn't good. When i tried to burn with automaticially select layer break point... encore stops saying no layer break point selected. When i try the manual layer break point button i get nothing.. (No dialogue box.. which i think should appear..)

Any ideas... working on a deadline and new to Encore but not to the adobe suite... Help would be really appreciated

Thanks
Luke