Reply To: Double space blog content, font size, etc

3. Try:

.single-post .entry-content img:first-child {
  width: 100% !important;
}

4. Try:

#recent-posts-2 li {
  border-bottom: 1px solid #ccc;
  padding: 5px 0;
}

5. In your AddThis settings, you’ll find an option to stop the share buttons from displaying on Home. This is what you want. If it doesn’t work, try:

.home .addthis_toolbox {
  display: none;
}