Sometimes some FSMs were kinda buggy and they couldn't stop setting Local events to Global. Even when I'd "localize" them, after a while, behind my back, they'd become Global again. That happened much less with the 1.9.x versions.
This is not the only problem I noticed on events either. If you check the Events tab, you'll see that that each event's count changes to 0 too.
I think the whole events sorting and management needs some serious updating, and would gain in power if it were more flexible regarding the Global attribute too.
The Events tab could display some extra useful information.