Careful - Buy/Sell window does not reflect and update the LTP closely !!
i had seen the same problem once, i think that window shows best buyer / seller. better if @nithin clarify this.
@siva can you check on this and see if it can be replicated.
@Neostar was the scrip added on marketwatch also NSE? Had you kept the buy order form open for a while, where the price moved away?
I think the open duration doesn’t matter but don’t remember very well.
Will check on this.