Winter league starts up in a few weeks so i'll be breaking the stick down on a weekly basis.
Whooaaah hold up there. You really shouldn't be leaving the stick put together unless you're shooting with it. All of my cues in recent memory have been the uni-loc joint and the only time I've had trouble getting them apart was when one got kicked over by a drunk in a bar went flying and the joint smacked the table.
If you're leaving the stick out propped up against a wall, the sideways pressure could be damaging the joint (not to mention hastening shaft warpage). Always take the cue down and store it as close to vertical as you can.
It could be a quality control issue, maybe the joint threads weren't cut properly at the uni-loc factory. Maybe the joint got damaged or installed crooked at the Predator factory. It may also be a moisture/temperature issue. It could be a combinatino of everything. Regardless, you don't want to leave your cue put together unless you're shooting with it. It's steel going into brass. Steel is much harder than brass and sideways pressure will gradally deform the brass threads further. Both will oxidize and their oxides may fuse together slightly if the joint is left assembled for long periods. If you put it together when it was cold and tried taking it apart when it's warm, you're also going to find it sticks shut. (Brass in particular
really expands and contracts in response to temperature.)
Uni-loc should go together and come apart easily, feeling loose until the final 1/4 twist, so unless there has been some sort of incident with the cue while it was assembled you may just have a bad joint. Predators do have a limited warranty, so you can contact the and see what they recommend. A cue repair guy may be able to look at it and tell you what's going on.
For now check that the shaft by itself rolls flat on the table. If so, check that the whole cue rolls flat on the table when assembled. If there's a noticeable wobble, the joint has been damaged.