LC1 and LC2 Currency translation differences

Hi Experts,

MIGO and MIRO entries posted different values in LC1 - CAD and LC2 - CAD in FI document.

Following are the details of the GR – Return delivery issue.

When comparing the currencies (LC1 and LC2) of the FI document posted for Goods Return, the translation was not carried out according to the valid exchange rate.

Here are the info.

                                                     Tran.curr. USD * Exch.rate       LC1- CAD         LC2-CAD

GR                       12/17/2014                149.36 * 1.1625  =            173.63         173.63

GR _Return       03/31/2015                149.36 * 1.2689  =            173.63          189.52

GR                       04/23/2015                149.36 * 1.2250  =            182.97          182.97

Details of the currency setup for co code:

LC1 (10) - Company Code Currency CAD

Source Currency: 1 Translation taking transaction currency as a basis

LC2 (30) – Group Currency CAD

Source Currency: 2 Translation taking first local currency as a basis

What could be wrong with the setting? Recently, we went live with currency conversion (SLO) and then New GL implementation. Any suggestion highly appreciated.

Thanks