ah, I see your problem now... when typing just numbers for dates, computers are not smart enough to guess if 1/7/1914 (or 7/1/1914) means 1st July or 7th Jan.
Americans tend to always order by month/day/year, while Europeans usually order by day/month/year.
I forget which is the default for WikiTree. Even as an American, I personally prefer to use the European style, as it makes more logical sense.
Instead of numbers, spell out the month and leave no room for doubt (it will accept either order then).