This post has really enlightened me on the issue of tagging. Many of us makes the mistake of using wrong tags, just because they are popular, i hope this helps.
My question now is that,since my post can be seen in the four secondary tags, will my post be deleted completely from them and moved to a new one if i edit my post and use new tags?
You have a certain amount of time that you can edit your tags. I believe it to be 8 hours, but I am not completely certain. The tags are fluid until the time expires.
Thank you for your response, that means if i edit my postand change tags after the 8 hours window, my post wont leave the old tag and wont reflect in the new tags i changed to?
Yes. I also got a new bit of information from a reader: You can't edit the first tag at all. Not even for a minute.