I was trying to fix a slow draining bathroom sink today, so I followed the instructions in this YouTube video. Everything went fine (and it's draining perfectly now), but I can't seem to re-attach the drain pipe (which I believe is called a p-pipe). The part that goes into the wall just doesn't seem to line up properly no matter what I do (and I must have tried 15 times by now). So it just ends up leaking out of that spot immediately.
I have included some pictures to try and show the problem - as I start to turn the slip-joint on that end it just seems to get out of alignment somehow, as if it's refusing to following the correct thread. It also feels like the pipes just aren't really in the correct spot for things to line up, but I guess that's just me not knowing what's going on.
Is there any trick I can use to getting this to line up properly and connect properly? All the videos I've watches just emphasize that you should tighten them by hand, it should be easy, and you shouldn't use any tape or caulking or anything.