Show the card information for the card you're talking about.
Find it in the browser and press ctrl + shift + i to pull the information up.
I suspect that you studied this card well after its initial due date had passed. When you do that, Anki (rightly) assumes that you know the card pretty well, and increases the subsequent interval.
That being said:
Easy means easy.
I'm not sure why you would hit Easy and not expect it to go far into the future. The point of SRS is to not waste time on things that you already know.
Don't worry about the intervals
In general, if you're rating the answers correctly, you can trust what Anki wants to do for you.
Don't worry about the displayed intervals, and I generally recommend that people turn off the ability to see them.
Switch to FSRS
FSRS is even more trustworthy than the default algorithm. You should switch it on in your settings. The only additional complication is that you have to make sure you're using the buttons correctly, and you need to press the Optimize All Presets buttons once a month in your deck options.