Not so sure you can add a transition to the middle of a linked AE composition. Never tried it. If you are transitioning from one linked comp to another, be sure you have handles (overlapping frames) in order to complete the effect.
As for your scaling issues, what are your export settings? A screen shot would help.
The file is a 1920x1080 I am importing from AE, yet when wanting to export from PP to an UNcompressed AVI. PP scales it down to a 720 X 480 file? Why?
Because you told it to. Seriously, the export settings are normally set by the user, so if that's what came out, then it's because of the settings you used - probably DV, which would be incorrect for HD work.
Does PP remember the last export setting used? I simply imported that 1080AE file. and then used file>export> AVI Uncompressed. Then noted PP wanted to export the file as a 720x 480 or whatver it is...Not at my WS ATM. One would think it would export whatever the sequence is in the timeline?
I do have options if selecting say 264 with a HUGE drop down menu for vimeo, youtube, etc.
Does PP remember the last export setting used?
It does. And that's a good thing. It'd be a PITA to change them every time for a series of exports that all need the same settings.
That must have been it for my latter question. I recall converting a 1920 to 720. Heck I think it was you who commented on doing it. I will have to remember that. AE spoils me so... LOL!