I randomly got money from SLC

Hello, I have only recently re applied to go to university for third year, and I ended up getting a message from slc that money would go in my bank today. Well it ended up happening but there's 3 issues, 1st issue is that it's not the amount of my maintenance loan so what could it be for? 2nd issue is that it's not at the correct date it would say to give me money? And 3rd issue is that this was so random since I've not applied for anything else other than sfe. I'm just wondering if anyone knows or understands what Is happening?