[GAMEPLAY] Kindred marking not having Cooldown

So, rolled Kindred in ARAM. I mark the enemy Karthus at the start because he's probably gonna go suicide. Get the mark. I immediately mark the sion, get his as well.

Bug 1: Before the passive was done cooling down, I got to mark the enemy blitzcrank and get his mark. The passive marking of someone else after it's been harvested seemed to have no cooldown, and on several occasions I got to mark someone while the passive was on CD

So that was great, got 3 early marks. Another funny thing happened after that. I got the Blitz mark, yet he didn't go on CD. Because he was demonstrably as suicidal as the karthus, I went ahead and remarked him. Killed him again as soon as he ran out of base from giving me the mark the first time and gave me a second one. And the same thing with a third.

Bug 2: Randomly, harvested marks on targets would not put said target on cooldown. I got to mark and harvest the same target multiple times in a row, both Blitzcrank and Karthus I specifically noticed.

This didn't persist throughout the whole game, and the passive CD sometimes did restrict me, as well about 70% of the time a harvested mark would properly put the target on CD. All i know is that I got an awful lot of marks in that game, even getting 6 by minute 7. If this worked on SR (I don't know either way), this could be potentially gamebreaking as a snowball mechanic.