I wrote 3 posts but I don't see them

A couple of them appeared to be duplicates and were deleted. One was approved, and was joined to your original question.

At the moment your posts have to be approved by a moderator, and as there are only a few of us there may not always be one available immediately. You don't have to supply your email address on this website when you sign up, but if you add your email address to your account information (click on your username at the top of the page, click on "Account Settings", click on "Email + Notifications"), and verify it by clicking on the link we'll send you, your posts will appear at once without the need for a moderator to review them. You'll see there are options there for enabling/disabling email notifications. We don't spam.