FIFO check

Dear All,

In our system our previous consultants have activated FIFO for GI, whenever i try to post the GI system is proposing batches accordingly to their batch creation date.

In material master classfication view is not extended eventhough system is thriwing the batch with FIFO

1. Where the settings has been made, where should i check ?

2. If 2 batches are created on the same date system for one time proposing batch1(creation date 1.1.13) next time other batch batch2((creation date 1.1.13)) eventhough batch1 qty is not over

Please suggest