I went in and purchased some Cold Iron and Alchemical Silver Arrows for my character yesterday and found something strange...
I only wanted 25 of each (instead of the 50) so I bought 50 of each and sold 25 of them back.
The Cold Iron Arrows calculated correctly by showing that I only paid 2g 5s for the 25 (from the original 5gp) but when I sold back 25 of the Silver Arrows, the screen to make the sale showed correctly (51g, odd number other coinage) but when I look at the info on my character sheet, it showed the value as 101gp, same odd number of coinage. It took the right amount of gold from my total, but displays incorrectly.
Example
I only wanted 25 of each (instead of the 50) so I bought 50 of each and sold 25 of them back.
The Cold Iron Arrows calculated correctly by showing that I only paid 2g 5s for the 25 (from the original 5gp) but when I sold back 25 of the Silver Arrows, the screen to make the sale showed correctly (51g, odd number other coinage) but when I look at the info on my character sheet, it showed the value as 101gp, same odd number of coinage. It took the right amount of gold from my total, but displays incorrectly.
Example