The thing is , it's not linear.
210 = 930 , 225 = 945 240=960. Antorus ilvl are Consistent 15 ilvl Steps, before and afterwards.
As we go down it changes.
M+0 was 885 before Patch and is now 182. So before the diffrence between Normal Antorus and M+0 was 45 ilvl and is now 28.
So cutting in down by 1/4 becomes wrong the further u go away from the normal scaling ilvl like 210 right now.
But wasnt Titanforged supposed to be infinite?
So theres nothing broken, ur just extremly lucky.