Problem of changing leverage ratio

Hello, I am sending a sell order of ZRX_USDT_FBIN, 4x 85.1 units in total, 340.4 units with the binance API, but it is reflected in Binance as 20x 17.02 units. The total quantity is correct but the removal rate is increasing, causing the liquidation price to fluctuate. What could be causing this problem and what is the solution?