Issues adjusting keyframes on photos with transition?

I'm having some issues with the key frames on photos when I try to apply certain effects like scale, motion, rotation when i have a transition. my issue is how do i adjust scale (for example). In the example below, i have transition in place. If i go to the first keyframe buy using the left arrow key on the scale line, it take me to the previous image.

the other challenge i'm having is if i manually go to that first key frame, and adjust the size,the scale I want doesn't happen until after the transition. so it has extra scale movement in when the sequence is played.

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