Yeah, the counterspell thing probably needs a ticket on choose's tracker thing if it isn't already there. I just turn counterspelling off in the options, personally. Usually not worth wasting the mana on, anyway. Just blow them up. Which yeah, when it comes to the bugs, that's how folks have won -- by avoiding them

Dispelled items come back after a while. Or should, anyway. Usually can just search a few times, or go take a nap. Greater dimensional anchor is something it's usually best to just sleep off, from what I've seen. Dispelling yourself is generally more trouble than it's worth, yeah. Has roughly the same effect as resting, except you still have a chunk of held mana just kind of being there.
You
shouldn't be having to pass magic res checks when you're PDing yourself, though. I don't remember my drow having that problem. Actually, I just bounced a level one one around in version Y11 with no problem. Let me try with a weavecrafter real quick... nah, weavecrafters don't have that problem, either. Not sure what problem you're having, but I don't think it's magic resistance.