Hi - my partner and I both have Google calendars on our phones and PCs. He has shared his with me, so I can see what he's doing and where he's supposed to be. He used to have a repeating appointment once a week, which then obviously showed up on our PCs and phones. He's cancelled this, and there's no trace of it on his phone etc. I can't get it off my calendars, although I've synced them. Is there any reason why, if he has removed something, it shouldn't update in my records?
Check out your settings. Open the Calendar on a PC, choose the settings (gear) icon and click the 'Calendar' option. On the right hand side there should be an 'Edit Notifications' option with 'Choose how you'd like to be kept up to date:' options. Maybe it's a setting in there that's changed , one of them is for 'Cancelled events'.