Can someone explain the timeline to me? I dont understand the time line of the story

so the girl is from the future and now he's in the past but when she tried to come back to save her father, she came back to the past that is a d]few years ahead than she wanted and now she has to stay to become the part of the past and wait for her father (that is from the future before his death while timetravelling) to meet him

but it makes very little sense imo, why would she want to go back to the past after when her dad had died, wouldn't she need to go back 10 years before that??

Bc her father visited this time before he died while visiting the waeran war, so even though this time period is after the war is over, because her father visited it before he died, she knows that he’ll come here. (Both the time period she’s in right now and the period when her dad died are “in the past” considering that they’re from present time, so even though the time period she’s in right now is considered the “future” in comparison to the war when her father died, they’re just different points of “the past” to her and her father bc they live in the present.)