B737 HGS AIII automatically activates

[LevelMind 1]

Hi,

Recently I've started learning and using the HGS in the 737. Something that I've noticed, is that whenever I set up both ILS courses/freq. regardless of what I've but in the MODE and STBY in the HGS settings, it seems to always automatically go in to IMC AIII as soon as I intercept the APP.

Having said that, my question(s) are: Is it suppose to be this way? Also, as a bit of a follow up question, is it common to set up BOTH ILS courses/freq. during a normal CAT I landing in real life?

 

Thanks in advance!
LevelMind