Mistake or no bigdeal?

[Astere]

Well I was just EV training my gallade just got it to lv 34
anyway at this time I made a big mistake with my ev count my original plan was Atk 255 HP 205 and Spd 50
but taking advantage of my macho brace I went over my atk limit now my atk EV is 305 and I edited my other stats to HP 155 and Spd 50. Did I make a huge mistake and should I lower my EVs or is this no bigdeal thank you for your replies.

[Bleach and Sunshine]

The max of ev is 255. So how can you really have 305?

[Astere]

what really!? ugh I'm such a newb at EV training I forget things sometimes.ugh -_-

[Shiny Umbreon]

Your Attack is 255, really, so, assuming you didn't get any more EVs, you still have 50 to use.