the videos i cut turn into the original

[johanna29762007kns8]

i have a problem where, after a while, the videos i have cut from an longer video turn into that video again. or at least thats what shows up on the screen. because the videos are still short (like the way i cut them) but the screen shows the original video. 

and i can't find someone who explains it and has the same version as me. 

it would be greatly appreciated if someone who has any knowlage could let me know. i have just began using the app and this might not be a big thing but im lost. 

[Peru Bob]

Try deleting the Media Cache Files:

https://community.adobe.com/t5/after-effects-discussions/faq-how-to-clean-delete-or-trash-media-cach....

[Rick Gerard]

Are you trying to use After Effects as a video editor? AE is not a video editing app. Most comps that pros work on are only a single shot and very short. Occasionally you use After Effects to create a transition between shots, but editing should be done in Premiere or another NLE. 

Odd behavior with preview is usually a Media and Disk Cache problem. Reserving a multiple of 4 GB of ram for other applications and setting the Disk Cache size to something fairly small, like 40 GB in preferences, often helps mitigate Memory and Cache issues. 

[Jose Panadero]

Probably you have open the Layer Panel not the COmposition panel. This is a common mistake on the newbies side. When double clicking on a trimmed layer, AE opens de Layer Panel where you can view all the original footage (similar to the Source Monitor in Premiere Pro).