@gazumped Indeed, I couldn't find anything on forums about duplicate notebooks... I hope I haven't brought a new plague into the Evernote universe! @DTLow They were named like when duplicate files get named on a computer, with (1), (2) ... (118) added to the back :/ I'm on Android (mobile) and Windows (laptop). "aaaaaaaa" is certainly how I feel at the prospect of deleting 240 notebooks manually!! Thanks for the responses, I sure do hope it doesn't happen again... but who knows!
So, Evernote decided to create 118 blank notebook copies of two of my notebooks. Needless to say I now have like 250 notebooks and sometimes experience sync issues, which I suspect could be related to these numerous extra notebooks. It really pains me to delete 240 notebooks one by one. Is there any other way to do this? I'm also really curious as to why this has happened? And only for two notebooks? (Though I guess I should be lucky it wasn't for all my notebooks!)