Why is my sim getting bills twice per week?

I have been playing only this sim for some time now in this save. I did play other sims in other saves and then came back to this save. When I came back it was saturday, and when monday rolled around, the bills came like usual. She paid them. Then she got a new appliance with the money left after paying her bills, it was rebate day. Then tuesday came and she got bills again, but of course they were higher because of the new appliance. I expect I will cheat her to have the money to pay the bills and then move on to see if it happens again the next week. In other saves I have seen this happen but at that point I was playing rotationally, so I blew it off. I'm wondering if its perhaps tied to lot traits/challenges? This same sim was also not able to cook foods straight from her fridge even though she doesn't have the simple living challenge on. She does have the reduce and recycle, no other lot traits or challenges but that one.