[Go No]

It should be “melt down”, not “meltdown”.

It should be neither. You’ve misplaced the comma and the period.

[Windflier]

“You’ve misplaced the comma and the period.”

First correction I’ve gotten in some time. Thanks, but I posted it the way I was taught.

[VanShuyten]

“You’ve misplaced the comma and the period.”

Depends on which style manual you’re using. In a few of the ones I used many decades ago (Chicago style, I believe), end quotation marks after other than direct quotations, such as to show irony or around individual words or letters always precede any comma or period for that clause. The MLA and most other style books agree with your style.

[RaginRak]

I think it should be “ they done be melted”

[Gene Eric]

The correct phrase is indeed melt down, and not the noun, meltdown. And of course, the punctuation can float within or outside the quotes — I'm curious, however, about the innie/outie implications in legal text.

Regarding your criticism, the contraction, you've, combined with misplaced forms the present-perfect which is an ambiguous expression in terms of past specificity. And since we know the precise time of Windy's post, the past tense alone should work; specifically: You misplaced the comma and the period.