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TPS25990: RIMON, RILIMT resistor power rating question

Part Number: TPS25990

Tool/software:

Hi TI expert,

2 questions as below need your reply.

 Q1. In real calculation, the power consumption seems far lower than 100mW,  Why RIMON, RILIM, R1, R2 suggest use 0603(1/10W)?

 May I use 0402 size (1/16W)?

 (80A*18.5uA)^2*1.1K=2.4mW;     12V*12V/100k=1.44mW

 

Q2. In R1/R2, may I use 100K/12.4K? Why calculation suggest larger resistance =>1M/124K?