If you applied from USA then your LVO is Ottawa. As regards sending passports to Canada from the US, I wrote a post long ago:
http://www.canadavisa.com/canada-im...y-indian-citizens-residing-in-the-usa.399633/
There is no law prohibiting a passport holder from mailing his passport to Ottawa. And please do not get carried away with what people say, instead rely on what the law is.
As regards the IP1, IP2 and NA. there are your status change and are mere speculation as to what may have happened.
An EE application goes through the following steps (not necessarily in this order):
1. Completeness (R10)
2. Eligibility (A11.2)
3. Criminality
4. Medical
5. Security.
In this the most important steps are Completeness and Eligibility. If your application has cleared eligibility, you are 90% done. Unfortunately the MyCIC states does not help you know about which stage your application is, but merely speculations are there that after a specific stage, it may have been at a specific point.
To know what happens at each stage - see
https://www.getgcms.com/blog/express-entry-application-processed/
GCMS is the only accurate way of knowing where your application is at exactly. Ordering GCMS is not mandatory and is a personal choice. You may decide to wait it out or order GCMS and see.
To know about GCMS see
https://goo.gl/6C1RMI