Perhaps these are a couple bugs related to a reading plan.
1. I had the ESV open to James 1:5 with the Interlinear pane open. Later, I opened my reading plan that is in the midst of Isaiah. I clicked on my reading for the day and the main pane dutifully opened to Isaiah's passage, but the interlinear pane stayed in James until I scrolled the main text in Isaiah. In other words, it doesn't look like the interlinear pane updates properly when going to a reading plan's daily reading.
2. Well, I was a few days behind in my reading. But after reading a day's dose of Isaiah, I clicked the "Mark Read" link at the end of the day's passage. Then, when I went back to the reading plan, and the day's passage was appropriately pale green to indicate that it was done, but when I "mouseovered" the day that had just been marked as read, it turned pink as if I hadn't read it. Perhaps this is expected behavior for my naughty behavior of not keeping up with my plan. Or maybe it's a bug. 
Lew