Greetings, Aace1313!
Thank you for posting your concerns about cooldown timers. In order to make sure that we have sufficient information for a thorough investigation, it would be a great help to us if you could post which specific skills you have experienced this trouble with. Also, the following information would greatly improve our ability to try to recreate this matter:

Platform:
ISP:
Type of Internet Connection:
Internet Connection Speed:
Date & Time:
Frequency:
Character Name:
Race:
World:
Class/Skill Rank:
Area and Coordinates:
Party or Solo:
Steps:
1.
2.
3.
<*Add more steps if necessary.>

Thanks again for your participation!