IMO,
IP 1 confirms R10 check.
IP 2 for eligibilty.
In R10 they check your documents for completion etc. and determine that everything is in order and you have provided all the needed documents correctly. If you pass this stage it means, your documents were complete and as per requirements.
After this your eligibility is determined to check your education, confirm CRS score and check experience, i.e they check whether you are eligible for the program you are applying and meet the criteria you claimed in your EE profile. this happens at IP2 stage.
As per your timeline i guess you must be at the IP2 stage by now or close to PPR. All the best.