Assuming nobody finds the vindicating page:
It is common to have vivid memories that are simply false.
The "usual" way for this to be discovered is when two people who shared, or "ought to" have shared, some experience compare notes, and disagree, each claiming vivid recollection of something incompatible with the other's claim of a vivid recollection.
Obviously, they can't both be right. At least one person must have a vivid false recollection.
Once the principle is accepted, it is inevitable (I think) that two people might agree about a shared experience, and be wrong anyway. These cases would be rare, since there are more ways for two false recollections to disagree than agree, but also because people are less likely to check corroborating memories than conflicting ones (which is not always even possible).
So, this is good. You have documented an instance of something rare.
People are always a little discomfited when they find out that a vivid long-term memory item is false. The very bedrock of our sense of self which is challenged. But hopefully it is some consolation that this happens to everyone, and that when it happened to you, at least it happened in an especially interesting way.
QUOTE
It's "Rogue", by the way.
Oh well. Good news: it still only counts as one false memory

. Bad news: even if somebody finds the page, it's still a false memory.