I'm new to this page and I just added all the tags on the blacklist that I don't want to see whenever I'm looking for images, but in the random section one or two tags don't seem to work or they just get completely ignored and I get images with the tags that I blacklisted, I'm not sure if I am expressing myself well

That's because people don't tag their shit correctly not your blacklist

Link to an example of an image with tags you've blacklisted on it from your search, and tell us exactly which tags are blacklisted.

I blacklisted anthro and I still get anthro tagged posts

See LeEpicMochi's post. That's the reason. Nothing wrong with your blacklist at all.