Easy ? could not figure this one

Question

I bought an AE template stretched it from the 5 seconds it is to the 16 seconds I needed Well first I stretched to 13 sec played around with it and then to 16 sec.
Now the Final Renders are not stretched to import into Prem Pro..
So I import the Scene file instead.
Funny thing here. I timed the text with the beats of the music, looks good in text edit area, then click over to view in the Scene tab and the music is stretched and not at the same speed.
So I removed music figuring the stretch messed with it. Added a new Mp3 track (Same tune) to the Scene (Drag and drop) same deal. The tempo is slowed down. In Scene tab but good in
the Text tab/editor
Text and Mp3 look, and are timed right..Under text edit tab, then I pop over to scene tab to see the whole compilation out of time?
I removed the Mp3 and then imported into Prem Pro figuring I could just add the Mp3 there, as there is an overlap or transition for my movie and the title anyways....
Yet, the exported scene is still outta wack or not in sync with music. After adding the music I timed it to in AE.... The Text edit area and the Mp3 in AE are previewing as in sync but
not in the Scene tab of AE nor in Prem Pro's timeline.
Another ? is the Final Renders that come with an AE template 720 or 1080 are those just rendered scene files re-imported into AE? Funny how when I make an adjustment to the text it shows the changes in the rendered 720 and 1080 file it came with although the 1080 file dropped the extra 3 seconds I added to the time line I ultimately needed as I had originally stretched it only to 13 sec but found 16 fit better. I tried to Render and re-import but got an error so I skipped that and then went on to just use the scene file in PP...
Thoughts?

Answer 1

More helpful would be a shot of the template with all layers and all keyframes exposed. Just select all layers in the template and press u.
If you want to simply nest your template in another comp don't use time stretch. Set the comp settings to 16 seconds then click on the nested comp and select Layer>Time>enable time remapping and drag the last keyframe generated to the end of the time line. Now things should be the right length. I can't guarantee however that the animation will be smooth because I don't know what's in the template comp.
On your timeline showing 1080, that's only the name of the active composition. There's no way of telling what the comp settings are unless you show us the comp settings or select the comp in the Project Panel so we can see the comp info.
If I were going to use a template for a project I would follow these steps:
Open the template and immideatly save the project under a different name.
Open up the comps and the pre-comps and check the comp settings using Cmnd/Ctrl + k
Adjust the duration of the comps to suit my requirements.
Make sure the comp size matches my output requirements. If not use File>Scripts>Scale Composition to change the comp size to my project specifications. (total time so far is about 5 minutes)
Start with the Final or Main comp, with all layers or none of the layers selected press the U key to reveal all keyframes.
With the keyframes visible start at the bottom right corner of the timeline and marquis select all visible keyframes in the composition. They all should be yellow.
I'd then select the last keyframe in the stack and hold down the Alt/Option key and drag the farthest right keyframe to the new end point for the animation. This will uniformly scale the timing of all the animation. If the layers do not extend to the last keyframe then I'd go to the last keyframe for each layer and set a new out point.
Repeat the process for the pre-comps. and run a quick 1/4 rez or less ram preview to check timing.
If everything is OK I've now spent 10, maybe 15 minutes on the project. If there are problems I'd look for them and fix them. I've never seen a template that was so complex that other change timing problems couldn't be fixed with a click or two.
Now, and only now, would I replace the place holders with my footage and type, make the color adjustments, and finalize the project for render.
The whole process may take about 15 to 20 minutes for most templates. The techniques for making timing adjustments for keyframes are documented in the help files. You can find the reference by typing editing keyframes in the Help Search Field. You will find this info.
Here's what a timeline looks like just before I click on the bottom right keyframe and Alt/Option drag it to a new ending time.