Don't take the rejection reasons personally. Those messages are part of the suggested edit review system. They aren't typed by the users. They're descriptions of the possible ways in which an edit can be rejected.
Unfortunately there's both a little overlap between a few choices, and times when the wording is harsher than intended. For example, in the edit in question, I rejected the answer because of the unnecessary mangling of the final paragraph. I considered the edit to be invalid, and marked it such. The wording on the "invalid" rejection reason tries to imply it should be used for edits that shouldn't occur, usually because the person making the edit was trying to do the wrong thing. I personally use it to reject the occasional edit that simply shouldn't be done, but doesn't rise to the level of defacement or sink to the level of "too minor," while also being difficult to manually improve.
The other reviewer paid a bit more attention and saw your change to the question title, rejecting the entire edit as vandalism instead of "just" being invalid. You snipped out half the words and started it with a lowercase letter? Sorry, that's not going to fly, especially when the first title was just fine.
Keep in mind one of the other stock rejection reasons. Your edits should add substance or improve the question in a positive way. The edit you submitted reduced the quality of the question instead of improved it, and it was rejected.
FWIW, I think you actually had an edit collision here. The timestamp on your suggested edit is about a minute after another edit by the other reviewer. A coincidence? Not sure. It's hard to tell from the lack of a unified timeline, but I think what I saw as changing the question title was actually an unintended revert of the title to it's original state.
That changes what may have been the rejection reason by the other reviewer. If your suggested edit would have been approved, it would have undone the work he'd just done to clean up the question in a similar way. This also explains why your memory of what you thought you were editing doesn't match what the system says.