Years catagory not displaying correct information

I was looking through my coins by year and I noticed that the year 1913 had 6 entries, when I clicked on the bar displaying it, It only showed 1 Wheat penny from that year.

 I attempted to remove and add the penny once more but it still has extra entries that are not displayed. I suspect that I may have had some other entries from that year that I removed prior but it still has not updated properly. This is the only example I've seen on my account thus far but it is possible that there is more that I am not noticing.

Just for a little more info if needed, When the penny is removed, It only counts as 1 coin so I don't think its the Penny, as for my browser, I am currently using fire fox, I'm not sure if the browser is the issue. In the My collection tab, it also only has 1 displayed. I am also pressing on the year bar from all my coins in general, not a paticular collection

I did notice something, I do have 5 Buffalo nickels I have marked as Dateless. Since their minted year starts in 1913, I do think that could be the source of the mix up but it makes things very confusing when they don't show up when you look in the years category. I think this is the cause for the confusion but If there is a way to not display dateless coins or maybe have a separate column for coins without dates 

You figured it out all by yourself. Those 5 nickels in the Undetermined year line are recorded as 1913 in the Years graph but nowhere else. You can prove it by changing the quantity to anything else and refreshing the Years graph. I think it's something that should be changed (not really a bug since it's by design, intentional or not).

That sucks, I kind of wish it showed up when you clicked them in the graph to make it less confusing. This may not be a bug but I hope this is somthing that gets looked over and maybe corrected in a minor update to the cite