They should be thin at the bottom. It's actually bad for them to get fat and blunted at the tips. So don't worry about that.
I can see a little bit oh hair that is untangled, but no more that I would have expected at 4 months. Don't worry about that so much. I love the beads. Very cool. I'm actually thinking about getting some cuffs like those soon.
Keep up the updates. I want to see where your mullet goes from here lol. Dreadlocks are almost always mullets. We just call them something else
i feel like my ends do the same sometimes, then other times they seem tight. the hardest part is not messing with those parts.. Look great at 4 months tho!!!