If you can't figure out how to extend the composition and the layers in the template and adjust the keyframe position then you need some basic instruction on how AE works. The easiest way to find help there is to start here: Basic AE
I didn't take time to download the template but there's not much in most templates that basic key framing skills and basic standard workflow techniques could not solve.
I understand how to extend the comp and keyframes. my issue is when I do extend them the box only allows up to 20 secs of modification anything after the 20 sec mark and it will disappear and the image will become distorted.
I can latterly deselect everyting in the comp and the box stays with no way of editing it. when moving the slider around to different points in the comp no values change for box setting. latterly no values exist in any scene from 1-19 to edit it past 20 seconds.
Though I do appreciate a response it is not something as simple as remedial basics
Select the layers you want to modify and press the U key twice to reveal all modified properties of the layers. They may be nested comps or contain expressions. The layers may be locked. You may need to take a look at the flow chart to figure out how things are laid out.
Without seeing a screenshot of the entire UI and the modified properties of the layers giving you problems the only way for me or anyone that has not paid for the template to help you is to see the details. Don't crop the screenshot, just PrintScreen and paste to the forum. If you can't figure things out your best next inquiry should be to the folks the sold you the template.
Sorry for this issue. Did you ever find a solution? Please let us know if you have or if you still need help.