Red cedar drop and Side scan

I droped 2 red cedar drops, 30lb concrete and 1-2-3" red cedar limbs riseing 6 ft tall. This is just going in a channel edge, there are 2 stumps you can see that have produced many crappie in spring along with shell crackers. I removed the christmas ornements prior to drop. I was surprised at how poorly my images were. without a GPS I would never find them. 190 is the marked spot of the drop and you can see how far I went past the drop before the image was in center of viewfinder.
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settings were all set on automatic. What can I do to get better image of the red cedar?

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here is drop with range down from 50' to 20'

Thats as good as I have ever seen, On how far past waypoint till you see the trees,only thing I can think of is scroll speed. When Rickie sees it he will have a better answer.

Brush is definately challenging sometimes....

I think it's because limbs just don't give enough flat reflective surface for the sound pulse to bounce off of...

Can you give us the following:

(Is this 455kHz or 800kHz...??)
(What chart speed is this..??)
(Did you mark the waypoint as soon as the brush went overboard or did you mark it by re-passing over the brush...??)

Rickie