Siege experience or bug?

When crystals in castles are alive port inside take 30 seconds. If crystals are down port take 8 minutes. But if to think a bit u will come to such decision. Port there 1 buffer or 1 clan mate and count time. So every 8 minutes u have time for regroup your clan in castle and make full pp buff before in town npc rebuff.

But how it works?

Example :
Clan Tribunal. Rune Siege. Oblivion forces attack Rune. Oblivion destroyed crystals after 15 minutes of clan siege. Sajmon died from enemy and port in to Castle talk to npc, and say in voice chat «8 minutes port to castle» , if not all forces of clan is destroyed and still control castle, members that down stand up town make npc rebuff and port castle. Every 1-2 minutes Sajmon inform members in voice chat how many minutes until port will port clan inside castle, 8-5-3-2-1 minute to port. After all port inside Sajmon say port buffer inside castle and start one more count for port inside castle and inform me time when port will port. We pvp if no danger for prey castle, members do rebuff in town and port inside castle and wait next port if die. If some one would start prey castle when time to port less then 3.5 minutes a few strong party’s will log summoners and summon fast to cut prey to win time with port inside castle of all clan.