Failing to recognise one's own work Disclaimer: 
This is not a self help question, I am using myself as an example to illustrate my question.



Example:

I have posted many questions and answers on this site within a relatively short time. Frequently (and with my blessing) our Mod Jeromy will edit my question titles. He does not edit all of the titles.  

I find myself browsing through the site, looking to upvote older questions, looking for unanswered questions. Sometimes (and too often) I come across a question and think, that's interesting, only to realise I posted the question. I do this with answers also. I think that's interesting and see I've posted it.



I can surmise, it is because of the sheer volume, perhaps stress and the inability to process memory.  I am wondering if this is a known condition.

Question: 

What causes this phenomena of failing to recognise one's own work?
Is it a recognised condition?
Which part of our brain is responsible for this?
I'm using your example, because another example would lead to a different interpretation. Using your example is not meant to help you, just to illustrate my answer.

The normal situation is to forget things. There are people who dispute this, believing that you store any and all information you ever encountered (after all, what would the famous 90% unused brain be for?), but from a more scientific perspective, most of the info that goes into your sensorium is simply lost after it was used. Because you don't need to remember the color of the car that just passed.

So the question is, why and when do we actually store stuff in our memories? Short answer: when it appears important. Usually, because it is connected to an emotion. If you care about something, you remember it, if you don't, you won't. This does not mean that you only forget stuff that is unimportant, though. If you are stressed or distracted, important things are momentarily unimportant.

Interpreting your example from this perspective, we could infer that you did not much care about those questions you wrote, at least not individually, because you asked them for other purposes (passing the time, gaining reputation, socializing in a community), or that you have other more important stuff going on in your life and that you ask questions here as a distraction, while part of your mind is still elsewhere.

But then, there is another phenomenon: If you have a thought and want to remember it, it blocks your mind. I'm sure you have noticed how trying not to forget the great sentence that you want to begin your next novel with keeps you from having any other ideas. That's why writers carry notebooks: they jot down the sentence, and immediately forget it, freeing their minds to new ideas.

So when you write your question here, you are actually telling your mind: "Okay, that's done, now let's think of something else." And your mind complies, discards that idea, and starts thinking of other things, forgetting any former thoughts.