that is really strange. are you sure they were listed at same day? maybe USD pair was listed before at 0.20 USD and when the price was 2.50, then Binance added USDT pair of that coin? because otherwise that doesn't make sense.
I made a mistake in the question, it is
On December 12 at 6 am 1INCH-USD is at the price of 0.20USD
On December 12 at 10 am 1INCH-USDT is at the price of 2.50USDT
Actually USD and USDT are not listed at the same time?