Calculation of continous stay for Tier-2

[JAT85]

Hello group members. I am new to this forum. I need your help to for ILR application from Tier 2 visa.

I was granted visa from India on 15 March 2013 and I entered UK on the 15 May 2013. After delay of 61 days I entered UK and joined company A.

I lost job with my company A on the 15 March 2015 and joined another company 2 on another Tier2 visa. Difference in curtailment of company A and joining company B is 54 days. My question is can I count the time period for settlement between:

a> visa issue and entry in UK- will this period will be counted in total 180 days away
b> less than 60 days gap between 2 jobs- will this period will be counted in total 180 days away

Can I apply my visa back calculating 28 days from the date of visa stamp i.e. 15 March 2013 and what documents shall I provide to support the gaps.

Thanks for your help.

[JAT85]

Admins really appreciate if someone please reply to my question. Its confusing after new changes in Jan 2018.