ILR for PBS Dependent - Unsure of EC Date

[alphaherts]

Hi,
I need guidance on below issue.

my friend has completed 5 years on Tier 2 General visa and about to apply for ILR next week.
My friends wife has got EC from Pakistan on 30/07/2012 and joined his husband in December 2012
we are not sure (no proof)about EC application date in Pakistan, whether it was made before 09/07/2012 or after 09/07/2012.
First Question : Is there any way we can find out about application date for application submitted in Pakistan or not?
Second Question: Can we include Wife in ILR application as 2 years are completed in UK ?
Third Question: Further to call to Home Office call centre, my friend's wife will be eligible for ILR in December 2015, after completing 3 year residence in UK (we haven't heard about this rule, do you have any information about this rule)?
I will be grateful if someone can guide us on above query.