This is super common, when I applied for a student visa my dad pulled mine and it was missing multiple trips for sports, visiting grandparents, etc. There were even cases where they had me entering the country and never leaving until I reentered months later.
I looked at mine the past few months and it was still very much the same, I travel back and forth 1-2 a month and they hardly have accurate dates.
I do not believe I94 is needed at the interview, if they wanted it, they could get it themselves fairly quickly.