But there is a gap for 2nd lower with NS from maximum 4032 to first tier of 2nd upper 4300+..

I find it weird..
For me with working experience and I feel it's related even though not investigation related..
Can I be asking about 4.5k ?

I think for a second upper with experience should be getting that instead?
Whereas me, can only ask around 4.3-4.4k, comparing I have 2.5 years exp should overtake a 2nd upper without exp...

Logical?