It sounds like you are running it on mirror mode. Mirror mode is still a beta version and is unstable, dialogues is something it has never supported. I have written a report on it months ago and it is a known issue but unfortunately no scripts that require dialogue interactions can work on mirror mode until they update the mirror client (version 2.2) http://osbot.org/forum/topic/94170-mirror-mode-dialogueswidgets/
Make sure Paypal processed your payment and sent it to OSBot, completed payments are marked as "completed" in Paypal. If it's still not working, send @Maldesto a private message and he will assist you with anything sales related on OSBot.
I'll remove the completed ones from the available list.
I haven't encountered this before but I'll take a look at Ghost Ahoy, this quest might modify the Ecto-funtus configs, not allowing the bot to obtain the ecto-tokens..
It will only buy the items you don't have the required amount or more in your bank + inventory. It's not Demon Slayer not working, it's all quests. The script stopped working since the release of the .65 client yesterday and will not work until the SDN updates. If you feel something is not working though and it's not related to the OSBot client I would appreciate if you could write a bug report with as much info as you have.
Bug report template can also be found on the first post:
They already get notified when I push the updates, if I put more pressure on the development team they will just ignore the updates. I'll talk to @Maldesto to see if there is something that can be done about that though.