Big Bang patch glitches, surprises, features, comments...

I heard that all summon bosses were glitched, but then I heard in game that they were working, to give it a try, I went pap twice, which worked perfectly, meanwhile a friend soloed zak and had no trouble.
So I said "I think I'll go solo my first zak, I'm weak and my skills aren't where they should be, but this might be fun".
Got there, altar was empty so I went in with no trouble, killed the arms perfectly, when I got to body things started to get weird, after the first 10th or so, the HP bar disappeared, so I didn't know how much I had killed, then when he started summoning stronger monsters, the Cuzcos (Big brown rocks with like hats) were invicible! I would Dragon strike and dragons popped out from thin air, sometimes it would show a "lvl 68 Cuzco" (or whatever lvl or name it is), but that's about it.
Then, when I estimate I killed first body, 2nd body didn't appear... I was gonna quit but I accidentally hit the Time leap button instead of scroll lock and dced ._. I haven't gone back online yet, but hopefully my char isn't stuck.

For the record, I've NEVER experienced any issues with any boss, and I run on Windows XP 32bit.