What I mentioned above was based on my personal experience mate...
Here's the ranking situation for one of my videos I uploaded 11 days ago and ranked it with the such views:
View attachment 238251
The first tag ranked #1 after 4-5 days for me. It was #5 before that period of time. But some other tags you see there ranked just hours after uploading the video.
I did not test that, but I guess maybe 1K views might make a single KW rank not many ones...
If you count the number of tags in the SS above and also consider the number of views, you"ll notice that non of my tags got anything below 1500 Views. That's why I suggested going with more views.
My suggestion (And again it is based on MY personal experience) is you don't feed a video with other kinds of views just after injecting CTRs. Also I suggest going for "newly uploaded" videos. Such videos can help to harvest the most of the juice!
Finally I suggest you ask them directly whats the matter anyway. Maybe you need to give it more time (Like I did). maybe it is a glitch of some kind, Maybe it is a new YouTube update. I don't know for sure. The guys themselves might know whats going on.