I have borrowed home loan from SBI max gain for 20 years. Last EMI was for Rs. 10,575 and interest debited was for Rs. 7,815. If I look at my surplus amount parked in OD account and its interest then as per my calculation, principal deduction should at least amount to Rs. 1,000. But the actual amount deducted is less than the calculated amount. Is the principal on my loan correctly deducted?