Why would your questions keep disappearing on this site?
Also, this question was originally posted in the Miscellaneous FAQ but it was moved to the WikiAnswers Problems and Support FAQ because it's a question about this site itself.
However, if you had bookmarked the URL of your original question you would still be able to find it. You could also "watch" the question by putting it on your Watchlist, if you sign in.
Another possibility is that your question was deleted. Although this is rare, questions are sometimes deleted when they have been asked dozens of times before or when they look like vandalism or spam.
If you're still having trouble, please send a message via the Contact Us form (provided as a Related Link).