question about "last post"
 

i don't understand the reasoning behind "last post"--i seem to be relooking at the same pictures again and again because of this feature--it is, after all, in green again. even the time and date do not give a clue that it is a repeat, if i happen not to remember the title line of the post. and that is just not going to happen that often. could you tell me the "why" of this feature.