On Etsy, sales are individual items and orders are number of orders that came in. I suspect you had some orders that included multiple items. Hence 76 orders and 80 sales.
Orders are the number orders and there are no 'sales' on the stat page.
On the dashboard, sales are items sold. Orders are orders that might include multiple items.
Sometimes there is a lag between and an action and the data on the Dashboard and the stats page updating. I've also seen data seem to go backwards ... usually around midnight and by the morning, it is correct.
You can also check the downloads ... sold order items and orders. You can also check your financials which shows a lot of detail.
On some of my listings with variations I'd seen multiples of an item count as one item in sales ... and I've seen multiples of an item count as individual items. I assumed that how multiples count on the dashboard has changed over time.
I've found that the dashboard and stats are pretty accurate within hours. I've found that views and visits are most accurate looking at days ... because views and visits are scrubbed ... removing bot views, etc.
