I recently took out a P&I variable home loan on a PPOR, with settlement next month. I have just been notified that my interest rate will be going up by 0.25%; however, the advertised rate on the website is still showing the lower rate I had signed up for.
Is it typical for this to happen, or should I try and get it lowered?
Yes it's typical (it will be written into the loan contract you signed). You can negotiate all you like but there's no guarantee of the outcome.