I really need help with this! Could somebody help me with this problem!!!
If you do time manipulations in After Effects it is a very good idea to render a DI (digital intermediate) to be used in your NLE. Don't rely on Dynamic Link to work. Dynamic link is a feature that only works with the simplest of AE projects.
You should choose a suitable production format - don't use a delivery format like mp4 or other highly compressed codec.
I that doesn't fix your problem then you probably are having problems with understanding frame rates and file interpretation. Let us know.
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Yes it was super helpful!
Great! I marked his answer as the correct one then. Hope that's OK.