There's always discussion about this type of thing. Just for reference, Shechen Monastery Nepal has a record of all such proculmations by Kyabje Dilgo Khyentse Rinpoche, so if you really want to check who He recognized, you can do so. You don't need to doubt or speculate.
They even have a complete record of where, when and what transmissions and teachings He gave. So if you were fortunate to be somewhere/someday and receive a transmission from Him, but didn't know what it was, as long as you know the day, you can still find out what you received.