Hey David,
I already emailed you but just for anyone else encountering the same issue:
I’ve made some changes to hopefully decrease bugginess –
1. Not allowing like count to go into negatives (It resets to zero if for some reason it goes into negatives)
2. Throttling ajax requests
The core issue was with cookies, and I have addressed that as well… The path wasn’t being used on setCookie, so if you had the same like link on different pages (eg on single & index) they wouldn’t match and it could cause the negative like bug.
I’ve pushed the updates to 1.6.1 and it’s available now.
Unfortunately, if you have outdated cookies from 1.6 you’ll need to delete them from your browser.
Sorry sorry sorry that this happened to you! Let me know if this fixes everything & if you have any other questions.