Yeah, sure, 6 months' statistics are more important. But, You cannot be at top (or second) forever, be happy if you managed to be there even for a while
Jokes aside, this is still a big achievement since it's the first time I see manjaro so high up the ladder.
Furthermore, I believe that the 1 month's statics show the future. I've seen distributions like ubuntu, fedrora and opensuse go high for a moment when a new release comes out, but that isn't much the case for rolling distributions like manjaro. So, I am optimistic that manjaro will keep the 2nd place (or 3rd) at 6 months and 1 year's statistics, it's just a matter of time until the results are visible there.