I just realized that in my theme by branchandroot (Scarlet, Modish) the header for the reading page is considerably down in contrast to the headers of all other pages like the recent entries page or the tags or archives etc. It seems like there is another empty line between the Journal title and the header which makes the header appear too far down on the page. This is also the case in my secondary account (JuSeed), a modified Fluid Measure theme, also by branchandroot. I had a look at my journals on three different monitors but the problem remained.

I'm sorry to bother you with this but I wanted to bring this to your attention because the fluctuating header is quite irritating when you skip between pages in your journal. Thank you in advance for your help and your gorgeous work!