Should I be entitled to more money from my survivor benefits through Reliance Standard?

My husband was on LTD with Reliance for two years following a stroke. Every thing I’ve read here was true in our case. Played the game and after four months received checks. Filed for SSD and received it. Paid back what we owed to Reliance and received a check from them for $300 a month which was the difference between what SSD paid vs what Reliance owed. Husband died last month and informed Reliance. Told there is a survivor benefit. Sent them a copy of death certificate and received a check in the mail for $916. The check stub said $69 of it was for the one day he lived after the last payment. Letter we received from Reliance telling us he was approved said his monthly benefit was $2098.56. I understand survivor payment in three months lump sum. Am I entitled to more money? Have not cashed the check.