If someone wants to correct their past by deleting their past (even though their past still exist), you just mad because you lost a few posts, but why trying to mention it?

You could simply provide the evidence to your campaign manager, he'd understand and would count your posts by date of posts, not total count.

I know how does it feel when you spend time to make a decent post and suddenly 6 of them are gone like that, but isn't better not to embarrass someone for their past behaviour? Maybe they are trying to fix the mistakes if you give them enough time.