TPS68470: ILED and 3V3_SUS questions

Part Number:TPS68470

Hi,

Some questions as below.

1. If LDO_AUX2 is not used, how should we connect 3V3_SUS?
2. If 3V3_SUS is supplied before 3V3_VDD, is there any side effect?
3. As below, if 5VS is supplied while 3V3_SUS/3V3_VDD is not available yet, customer found the LED will be lighted up.  Is this normal?  Why?

Thanks!

Antony