First things 1st:

High chance that STB AM =/= NCSS AM. One is a sb under the more atas MTI while the other is a sb under MSF, a smaller and less well endowed ministry.

Titles don't mean sh*t these days and cs has joined the entire bandwagon of giving fancy inflated titles, taking cue from the finance and pte sectors.

3700 for someone with 2 years exp and 2:2 sounds fair, considering that you're joining the social service sector which isn't that greatly paid to begin with.