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LM2673-ADJ turn instability.

Hello.

I have two questions for you.

I selected an LM2673S-ADJ and I want this operation conditions:

V out= 24 V

V in MAX = 35 V

I load = 2 A

When I try to determine the value for Radj  I use (37,125V / RADJ = 3A) -> RADJ = 12375 Ohm

If I put this value, the current limit is much earlier. Therefore, I end up choosing RADJ = 8000 Ohm. Do you know what is this about?

When I apply full load (12 Ohm) sometimes Vout turn instability. The only solution what I found that this not happen is turn up the current limit, but this is not the solution what I want.

How can I eliminate this issue?

I attach images for the Schematic and PCB

Regards Gabriel