For sure, but I've never seen a bank that notifies you when a transaction gets reversed, altered or canceled. It just happens invisibly. IIRC it's actually a feature, in that some companies will open a transaction against your account (for example - a deposit on a rental), and then cancel/alter it if the funds aren't needed. That part of the story is 100% normal for big financial institutions in my experience.
And yeah, PayPal support is legendary in just how incompetent it is - I won't deny that. But it seems like the author was originally upset about something that is a normal part of banking.
This feature doesn't really make sense if you combine it with PayPal's aggressive notifications about the original transaction. If I'm being notified about a relatively large transaction, I should also be notified if it's changed or canceled.
And yeah, PayPal support is legendary in just how incompetent it is - I won't deny that. But it seems like the author was originally upset about something that is a normal part of banking.