My own Template – Sidebar moves down after i made a new post

Hi Community ??

I have a big problem, which i can’t solve ;(

Everytime i add a new post to my page, the sidebar moves a bit down and my sidebar is now nearly at the bottom of the page.

How can I make it at the top and so that it doesn’t change the position when I add a new post?

Here is the code of the stylesheet, if you need more please tell me and i will add it:

body {

    	height: 100%;
    	width: 960px;

}

a.more-link {

		font-size: 15px;
		color: white;
		background-color: #FFB640;
		border-radius: 3px;
		text-decoration: none;
		margin-left: 10px;

}

a.more-link:hover {

		color: black;
}

a { 

		color: black;

}

a:hover { 

		color: #FFB640;

}

img {

		max-width: 300px;
		max-height: 300px;
		margin-left: 250px;

}

li {

    	list-style-type: none;

}

h1 { 

		margin-top: 2%;
		text-align: center;
    	font-family: Helvetica;
    	font-size: 50px;

}

h2 { 

		text-align: center;
		font-family: Helvetica;
		font-size: 30px;
		font-weight: 100;

}

h3 { 

		text-align: center;
		font-family: Helvetica;
		font-size: 36px;
		font-weight: 100;

}

h4 { 

		text-align:  center;
		font-family: Helvetica;
		font-size: 36px;
		font-weight: 400;

}

p {

		text-align: center;
		font-family: Helvetica;
		font-size: 20px;
		font-weight: 200;

}

p.wp-caption-text {

		display: none;

}

div#sidebar {

		float: right;
		width: 200px;
		margin-top: -295px;
		margin-right: 200px;
		font-size: 20px; 

}

#menu { 

		text-align: center;
		font-family: Helvetica;
		font-size: 28px;

}

#meta { 

		text-align: center;
		font-family: Helvetica;
		font-size: 16px;

}

div#meta {

		display: none;

}

#navwrap li { 

		display: inline;
		float: left;
		margin: 10px;
		margin-left: 60px;
		padding: 10px;
		font-size: 20px;
		font-family: Helvetica;

}

div#navwrap {

		text-align: center;
		margin-top: 100px;
		margin-left: 70px;

}	

ul#menu-menueleiste.dropdown {

		margin-left: -250px;
		height: 70px;
		width: 1900px;
		background-color: #FFB640;

}

#navwrap li a {

		color: white;

}

#navwrap li a:hover {

		color: black;

}

div#header {

		font-size: 20px;
		font-style: italic;
		text-align: center;
		margin-top: -200px;
		margin-left: 150px;
		height: 300px;
		width: 1000px;

}

div.inner {

		margin: 250px 20px;

}

a#title {

		display: block;
		font-size: 72px;
		font-family: Georgia;
		margin-top: -70px;
		text-decoration: none;
		font-style: normal;

}		

div.article {

		max-width: 800px;
		max-height: 800px;

}

div#content {

		float: left;
		max-width: 800px;
		max-height: 800px;
		margin-right: 30px;
		margin-left: 100px;
		margin-top: -100px;
		margin-bottom: 50px;
		position: absolute;
}	

div#article {

		margin-bottom: 50px;
		max-width: 800px;
		border-bottom: 1px solid grey;
		max-height: 800px;
}	

div.date { 

		display: none;

}

label.screen-reader-text { 

		display: none;

}

li#search-2 {

		margin-right: -960px;

}

input#s {

		width: 150px;
		height: 15px;
		border: 1px solid gray;
		border-radius: 5px;

}

li#recent-posts-2 {

		width: 400px;
		height: 200px;
		margin-left: 400px;
		margin-right: 10px;
		margin-top: 60px;

}

li#recent-posts-2 a {

		border-bottom: 1px solid grey;
		text-decoration: none;

}

li#recent-comments-2 {

		width: 400px;
		height: 200px;
		margin-left: 400px;
		margin-right: 10px;
		margin-top: 60px;

}

li#archives-2 {

		width: 400px;
		height: 200px;
		margin-left: 400px;
		margin-right: 10px;
		margin-top: 60px;

}

li#categories-2 {

		width: 400px;
		height: 200px;
		margin-left: 400px;
		margin-right: 10px;
		margin-top: 60px;

}

li#wpp-3 {

		width: 400px;
		margin-left: 400px;
		margin-right: 10px;
		margin-top: 200px;

} 

li#wpp-3 a {

		border-bottom: 1px solid grey;
		text-decoration: none;
}	

span.wpp-views {

		display: none;

}

strong.widget-title {

	margin-left: 35px;

}

div.wp-pagenavi {

	margin-left: -560px;
	font-size: 20px;
	color: #FFB640;

}

span.pages {

	color: black;

}

I cant give you a link of my website because she isnt online and only local.

Thank you very much ??