Ryze ult bug

I've been playing alot of ryze and some things seem off...

1. When you ult a minion wave and step out of the ult, it grabs the minions and teleports them but always seems to teleport a few back to the original position. I doubt that's intentional. I think this only happens when you don't take the ult with them. (Because why would I teleport myself into the nexus turrets?)

2. In a clustered teamfight, the E fails to spread to other targets no matter how many times I throw it on the same target (Proximity confirmed)

3. The E is an instant cast, sometimes when trying to last hit with it and the minion dies during the cast, the spell still goes on cooldown but doesn't grant a last hit gold or spread the E

4. Generally his combos are pretty smooth but sometimes I've noticed that the Q will literally fire a clean 90 degrees from where I'm pointing but that might just be my ping