I'm not able to reproduce a problem with this. Is it possible that this reading plan had verse 1 as the content from that chapter for that day? I know this was a few months ago, but if possible, can you send me the template for this reading plan? (Manage Reading Schedule and Plans, select the plan, then click Plan Options and choose Save As Template File)
I don't have the plan any longer. I can't remember now why I created a plan of only one book. I may have entered 1jo 1 as the selection to read, thinking it would refer to the chapter rather than the verse.