New LCA will take effect from date it is approved or depends on the date of Approval notice for H1b extension

Question

Dear Admin,

 

My H1b visa expired on Nov 19th 2013, My company applied for extension in June 2013 but it was approved only on 17th July of 2014.

 

When I got my approved visa petition , I noticed that my LCA is amount is higher than my actual salary by 5k.

 

When I checked with my company they said LCA will be effective from the date of approval that is July 17th 2014, Is it right ? or I should get the compensation mentioned in LCA from the date of new LCA validity date which is 20th Nov 2013??.

 

 

My current LCA ,I129,I797 are from Nov 20th 2013 to Nov 19th 2016.

 

thank you for clarifying.

 

Regards

SrikanthP