Prop shaft uj

What have I done wrong?
I got a pair of un branded but ome u/js for the rear prop to try and sort an annoying clunk.
I got the old ones out no problem,
Pressed the new ones in and one side of the yoke feels fine, the other side is tight and notchy and the grease seals are moving with the yoke???
I made sure the york was in both caps before I pressed it home, so the rollers were held correctly.
I'm stumped
This happened on the front and back u/js.
I'm going to get another pair tomorrow but without knowing what I got wrong I'm worried I'll get the same result.
And the bloody balance weight fell of so I'm going to tack it back on.
Any suggestions.

you may have dislodged a roller , sometimes it helps to knock uj yoke out with a punch to widen it after fitting joint, if its tight

Must be the time of year for it. Gotta do the ones on mine. After developing a nasty Vibration, underload.

Need to replace the bolts anorl. Anyone know what length the Handbrake drum bolts are???

I think the part number is FRC3602.
Don't know how big they are.

Bought another today, and fitted it all sorted.
Welded the weight back on in the right spot and it's driving fine, phew!