Limiting joint settings dont work?

I am trying to do something really simple so here it is:

I have an object attached to another object with a joint, and no matter what settings I put on that joint outside of enabling iskinematic on the rigidbody itself, the second object always trails behind the first object a few meters.

In other words, I have everything set to LOCKED LOCKED LOCKED LOCKED and it is NOT LOCKED. One would hope that by checking a setting for a particular reason that it would then work; it is very clearly set up in the inspector. I have played around with the hundreds of parameters on those joints for about a week now trying to get a simple behavior such as locking or clamping.

What am I doing wrong or is the system designed wrong? Do the limit settings simply not work on the joint systems and yes I have tried every type of joint. I find things do work up until a certain speed and then they just spread apart the faster I increase the delta v.

I have seen people get around this problem by writing scripts to put constraints on the rigidbody itself but this seems like a workaround for a bug rather than a logical solution to this problem.