Dehide and another issue lineage 2 na

I rerolled recently to TH. I was excited when reached 81 'hide is so imba, I'll pwn on oly now'. Turns out hide works strange... I counted at least 4 ways to dehide:
1) use AoE skills when dagger is somewhere close (which is the way its supposed to be, I believe)
2) cast skill/spell in the same time dagger uses hide skill (I think its also ok - afterall every skill can be interrupted)
3) this one is bug I think - thing related with summons, if you know what I mean
4) and this one is totally LOL for me - yday had an oly match against a nuker from top clan, I was like range 600 from him, 20 more secs hidden and he hit me with promi out of the sky. WTF? Anyone can explain it?

another matter:
our fortress was attacked and enemy parties got somehow to our spawn point. We got killed > we got killed again before casting nobless blessing. The question is: how did they get there? The only way to get to spawn point which I know is using soe2fortress or click 'to fortress' after dying. Did they use any geodata bug or sth.? Is it banable?
Thanks in advanve for claryfing those matters.

Hide is just bugged and you can dehide people easly with spam skills/Ctrl clicking

U can dehide w/o any ranger. It's like everyone doing it now.

And about fort yes, it's just geodata bug. In some place u can jump through this barrier.