hello, hello!

I am running into quite the technical issue. I have been skimming and straining through old technical help posts on this forum for ages to find out how to solve this.. so in a moment of desperation, i turn to you!

whenever i have a post that i'd like to update, like a diary or bio, i click edit and then begin adding my changes in the text box. i hit save. although, when i check the 'recent posts' tab, i do not see my post with the red updated text on the title, nor my post bumped up at all.

how do i remedy this? is the updated tag only achievable via other users leaving new comments on your post? is it something on my end? how can i let others know that my post has been updated? please, help!