i edited my posts once ... on second time it says "ur not allowed to do this" why? ^^

You can only edit your posts 30 minutes after posting, after that you are not allowed to.

Only the Mod Team can edit their posts forever.

Why? Because if you scam and someone is gathering proof you could easily go back and change what you said in a topic.

This post was edited by hphman1193 on Jul 11 2011 03:30pm

ok i understand ... so if i want to keep up a Shop thread and update offerings i have to create new posts everytime?

correct

You can also do it like this: How To Update First Post Without Editing

you can try this
http://forums.d2jsp.org/topic.php?t=26027073&f=34

if not, yes you'll have to create a new post to update it
note that theres also a 4 hour bump rule

this is great! thanks a lot