Bug or am i missing something? (less money from ah than the mail suggests)

[InsoNB]

Hey, i just checked my mail, i sold something.
After checking the amount attached to the mail i realised its not the amount mentioned in the automated mail.

am i missing something or is this some kind of bug?
https://i.imgur.com/pGyDJGQ.png

wait.. same happened with some runecloth i sold, its exactly 50% of what the mail says.

[hunterlady]

what is 13g 69s 10c divided by 6g 84s 55c?

[Whiksey]

Gold Squish'd! (Occured at 23:00 Jan 4th, even to mailbox gold)