I forgot to mention that i never have it on 1/2 speed because it's so slow, i have it on normal when i am not about to keep an eye on them and 2x when i can.
It was on normal when it said 340mins which is why i'm so confused about it, i doubled checked to be sure and it was definitly on normal.
I have been out and come back, checked it again and it's now back to normal, mothers are now nursing for 240mins on normal. I have version 1.0 so maybe that's why?