Coding for total volume vs number of contracts

Hi, I'm just starting to learn amibroker with datafeed from globa data feed for fno segment only. During market hours when i do an exploration based on volume the current bar volume is displayed as total shares while the previous bar volumes are displayed as total number of contracts. This causes errors when I do volume comparison. The problem resolves itself after market closes & the last candle is formed.
I spoke to the technical guys at global data & they that this is the way NSE provides the updates & there's nothing they can do about it. Is there a way to convert the present volumes as number of contracts or vice versa? Or should I simply switch my subscription to cash segment?
Thanks.

Coding for total volume vs number of contracts