Weird Tristana ult interaction. Need a fix.

I was just playing an ARAM as Tristana and I was chasing down the enemy Ashe. I used my rocket jump to catch up to her then flashed directly 'behind' her and used my Ult to knock her toward my team (think Insec lc$bigplayz). Between the time of me pressing R and it hitting her, she flashed back over me towards her team. Instead of my ult knocking her toward her team (because she flashed back to the "safe" side), she actually got dragged aaaalllllllllllll the way back to where she would have been if she didnt flash before my ult (right into the middle of my team).

What looks like happened to me if that when I flashed behind her and pressed R the game calculated her end destination before my ult even hit her. Even though she had flashed to the other side of me, the game did not recalculate the end point which should have been in the complete opposite direction. Is this a fair assumption of how Trist's ult works?

It kind of reminded me of some weird interactions with Ezreal's shift. Like how if he presses E a fraction of a second before a bind or hook hits him, he still shifts to his input location but is still binded when he gets there. I'm sure there are many other cases like this with some of these older champions. Feel free to list some in the comments.

Are there any plans to correct these weird interactions? They lead to some very weird and quite frankly total BS moments. Yes, Yes, I know. Spaghetti code, but they have to be fixed sometime.