A user on the forum leave me a feedback on my profile which is just a lie. I also left a feedback on joker_josue but it's not displaying to other's like his one is showing on my profile.
And how much it will be matter for a feedback
Since you're newbie on the forum I would suggest to read as much as possible you can . I'm sharing you some articles created by our reputable members, I hope you can find your all sort of answer by reading these topics. After reading all of these even if you have any question just ask to the community.
Beginner's Guide to the Bitcointalk Trust SystemI've collected some useful guides that I recommend every newbie read before leaving, receiving, or interpreting Trust feedback.
1. LoyceV's Beginners guide to correct use of the Trust systemThis is probably the best place to start. It explains the fundamentals of Trust System. You may look into this and try to grasp the full picture of it.
2. A Short Introduction to the Trust SystemA shorter introduction if you're completely unfamiliar with how the system works.
3. [Infographic]: Guide on possible reasons to leave a -ve/+ve trust feedbacks.Before you start using the feedback system you should learn when to give positive feedback and when to negative. You can also justify your feedback by reading this.
4. [GUIDE] Overview of the trust flagsFlags and Feedback ain't the same thing before misunderstanding you should read this.
5. Complete overview of users on DT1 and DT2 and their ratings You can see all the DT1 & DT2 members list. Good thing is LoyceV keeps update this threat time to time.
A few important tips for you Do not use the trust/feedback system without any reason. Just because someone left a feedback on your profile doesn't means you have to do this also. First justify it if it's accurate or not , try solving the matter of that user who has left the feedback on you. If you think talking is not working and someone is using their DT power wrongly then you can create a topic on reputation section and bring this to the community.