To 'confront ' manager

[badmgr]

New senior manager in post (1 yr with org but only 2 months working with me). Extremely controlling, incompetent, likes to be involved in everything but 'manages' nothing - delegates the work but takes the credit etc.
Constant mistakes and rude manner means that they have ruffled feathers. I report to this person.
Today (again) had a catch up meeting to update on business priorities and gave a briefing of a project i'd been working on (my specialism, not the managers) which is due to complete in 2 weeks. I explained everything that had been done, where we were at and said the only thing I need clarification on was the final fee. Manager said they'd email the third party to confirm final fee which I though was strange but let them carry on as they obviously wanted some involvement. Email has gone out to the third party basically asking all the initial questions which I had covered with them in their brief a month ago in order to complete the project!! We now look like twats who don't know what we're doing!
This happens regularly, not just with me but with other staff members being stepped upon and made to look incompetent just because this manager wants a piece of the pie!
We are all managers but this person is more senior. How would you approach the constant errors with someone more senior?

I'd go to their Manager.

Escalate with proof of the errors.

Refer it to their boss. Maybe an email with the original questions answered on it sent to new guy saying something like as per query the other day please see below for responses on blah blah points and as mentioned in our meeting of blah date and copy in his manager. Offer to provide more info if needed and be nice and ever so helpful while doing it as clearly management need to know more about it.

I do have proof but in this case and others, it's more that we had a conversation and they've just then gone ahead and done their own thing...how do I 'prove' or address that? Tbh, I think their manager is already aware but I prefer to confront things head on so its not tattle tale if you like. Obviously I've just never been in this position with my senior! It's hugely frustrating. One of our third parties has contacted us saying they will not work with this person! Everyone knows but no one is addressing it!

Keep meeting minutes with dates and actions and circulate it straight after the meeting.

By email.

Damia, cross post. I've tried your suggestion by putting lots in writing 'just to confirm' 'as discussed' etc. to try and prevent the problem from occurring in the first place but it still continues
I want to address this current email as it is a clear example of what happens but it's only clear if I replied to it basically saying why the fuck have you just done that?! Without actually using those words

Uppity - will do that now based on today's meeting!