Question struggle with UI scalefactor and UI animations

I have a problem with my canvases. I am using tweening for animate my UI, for example scroll rect scrolling down or calculated position. I'm having problems with these positioning animations at different resolutions.

For example, i have a leaderboard list with 20 items on vertical layout. Every item has 100 height on my reference resolution (1242 x 2688 portrait), and my match width or height property is 0.5. On my reference resolution, if i said to scroll rect move with animation to 500 position Y value, that means 500px moves and thats correct. But on different resolution (different from my reference res.) animation is broken. For example (2048 x 2732 portait), its moves more or less than expectation.

I am trying to fix this problem with Canvas Scale Factor. But i cant figure out how can i do that.