Although IP1 and IP2 doesnt hold any relevance now, but, IP1 is when your BG status says 'your application is in process' and IP2 is when it says 'We are processing your background check'
It is very difficult to get an ITA under FSW but if you're very lucky you might get a PNP. My suggestion would be to max out your IELTS score and a score above 440 would be a safe bet.
Get a new reference letter and make sure it is dated and upload it using a CSE. I hope they consider your new reference letter and process your application.
The average time to get PPR is 6 months for 80% of the cases. Some lucky ones get it in a span of 2-4 months as well and then there are some very rare cases which fall in 20% and are put in Security Screening and can take upto 1-2 years as well.