My Layers Move after Precomposing

[TylaCF]

In my first composition I always have my video matched with the beat of the audio wave form, so it's clipped and changing in sync with the beat. but when I go to precompose that composition, the clips shift out of place by a few frames away from the original position.

all my compositions are at the same frame rate of 30, i'm confused as to why the layers are shifting in the first place, how do i fix this?

[Rick Gerard]

Without seeing screenshots of your Main and Pre-comp with the modified properties of the problem layers revealed, it's pretty difficult to pinpoint the problem. Try turning on Collapse Transformations. Make sure that the Advanced Composition Settings do not either of the Preserve checkboxes turned on. 

Try purging memory and disk cache. 

If you share screenshots, copy and paste them or drag them to the reply field instead of using the Drag and Drop button at the bottom of your reply field so we can see them without downloading them.

[TylaCF]

Hey thanks for getting back to me, I started a new project to see whether or not if the layers still moved without precomposing and they do. Here's a before an after. 

The first picture is how they're supposed to be positioned, the second is how they shifted. It seems to happen after I prerender.

[TylaCF]

After some time I noticed that the wave audio form changes as I zoom into my workspace?

[Rick Gerard]

Both screenshots have the same composition name. I don't see any pre-comp unless you selected all of the layers, pre-composed, and gave the pre-comp the same as the original comp. I see the difference in the in and out points of the first four layers, but nothing else seems to have moved. 

I've never seen this before. If you pre-compose one layer and move all attributes, the new comp takes on the footage's frame rate. Maybe there is a difference in the frame rate of the footage and the main comp's frame rate, and because all 4 have the same frame rate, the frame rate of the pre-comp changes. That's the only thing I can think of.

[TylaCF]

Yeah this was a seperate project that i created, so that i could see whether or not it actually shifts with or without other compositions. it actually shifts the moment i zoom in this video below? 

[Rick Gerard]

There is nothing wrong with the timeline displayed in your video. Visually, the layers appear to move, but the timing does not change. You have pushed in so far that you see the individual frames, and the Highlighted area is the Shutter Angle for the Composition.  The layers still have the same in-point. All of the timing and the animations remain as they were. 

You should probably spend some time exploring the Learn Workspace to get an idea of how the UI works. 

Y