There is a cap of 99 for those items that drop trade tickets. There is no cap if you only craft them, so the exchange will let you go over the cap. If you didn't get a ticket from your exchange, you might want to reach out to support or do a quick trade (like dairy one) and take a screen shot of your trade ticket inventory amount before and after collection of the exchange. Let me know how you get on!
I've checked both of mine and they are definitely dropping trade tickets. I have logged a report though. Can you confirm how many trade tickets you currently have? Send me by pm if you don't want to post here where others will see. Thanks
I'll check on these 2 items. Thanks for letting me know