The Show Spell Description was a feature added by user request. It is different from the description shown in the spell card in that it shows the entirety of the spell: range, duration, components, etc. It was added so that users needing that reference could quickly call it up, bt it wouldn't spam the chat when not needed. Not sure why yours are coming out differently, it could be a matter of when they were added to the sheet, what sort of sheet produces them (PC/NPC), etc. I think it would take some experimentation on the specific characters you are using to discern the reason.