The sticky option is meant for ONE post that will remain permanently on top of more recent ones. When you mark several posts as stickies, the blog gets messed up: for instance, click "Older Entries" to see that two of your stickies show up in the second page too.
And the sticky option is meant for a special announcement or the like. Marking three normal posts as stickies because apparently you consider them important isn't a good idea: users re-visiting your blog may see the sticky first and leave at once, thinking you haven't posted anything else since Nov 25. I would suggest you unsticky those posts and highlight them in a different way - maybe link to them in a text widget placed up top in the sidebar, with some explanatory text added.