Resets themes automatically?

Hi, I am a beginner in Wordpress, and are trying to make my first homepage with WP:

I have made some changes, some of them regarding layout, ex. positions of elements (ex. on the homepage and News/“Nyheter”). This morning I noticed that the layout seems to be set back to its default? Is this normal? There is also a thin line around the main “textarea”, which not was visible yesterday…I have tried to set the border to 0 and “hidden” and “transparent”, but it still is visible… (on the original theme of Astrid, there is several lines around elements and I set them all to 0 earlier when I worked with the design). The changes have been done with the software program “Yellow Pencil”…

How can all this happen, is the question from an amateur in this “game”…

PS. I am using the free editons


First, please set static home page, you can watch this video to learn how to do it:

Also please check Astrid Documentation if you haven’t done it already:

Please feel free to ask any other questions that you might have.

Kind Regards, Roman.