Just a couple of pointers or observations which may help...
I use a 24mm 68 degree eyepiece when finding the alignment stars, and then switch to the cross hair once it is centred. Makes life much easier, as does an accurately aligned finder.
Do you use the Rate adjustment when centreing the star? Usually down at 3 or 2 you have very smooth adjustment. One thing to be sure of is that your scope is balanced front to back, if it is out then things can get a bit jerky or it just won't move!
Finally, always make sure you approach both alignment stars from the same direction, e.g. By moving up and to the right say. To a degree it doesn't matter which direction but keeping it consistent ensures that the backlash is being taken up in the same direction and this keeps things more accurate.
I do find that the gotos can get inaccurate when moving to the opposite side of the sky so realigning on stars in that area may be the best option.
Let us know how you get on.