groundsplitter
Chieftain
I haven't seen this among the other bug reports: Gold per turn for traded luxuries doesn't seem to end when the deal expires after 30 turns, at least not if you renew the deal.
I have two ongoing trades of tea going to Harald Hårdråde and cotton to Cleopatra, with Harald paying 6 GPT and Cleopatra paying 7 GPT. After a while I realized that both those incomes were listed/counted five times each in the Gold per turn tooltip. I wasn't sure how many times I had renewed the deals with them, but five times seemed likely. And after renewing both deals one more time just now, the two incomes are listed six times times in the tooltip. So it seems the previous income isn't removed, but another instance is added when the deal is renewed.
I have two ongoing trades of tea going to Harald Hårdråde and cotton to Cleopatra, with Harald paying 6 GPT and Cleopatra paying 7 GPT. After a while I realized that both those incomes were listed/counted five times each in the Gold per turn tooltip. I wasn't sure how many times I had renewed the deals with them, but five times seemed likely. And after renewing both deals one more time just now, the two incomes are listed six times times in the tooltip. So it seems the previous income isn't removed, but another instance is added when the deal is renewed.