Help! Avanti Feeds shares show wrong Buying Avg

Hi, I purchased 100 units of AVANTIFEED @1800 long back. Recently it underwent split (1:1) and Bonus shares (1 for 2 post split). By that calculation my hoding should be 300 units and I’m seeing that for past two weeks. However My avg buying Price should also get updated by same ratio, i.e. it should be Rs 600 now. But it shows Rs 900. How can I correct this? Beacuse of this all my portfolio numbers shown on site are wrong.