matched deposit bonus only counted my first deposit but promo page said next deposit

So I ran into something weird with this matched deposit promo. The promo page said it’d match my next deposit but only the first one got counted for the bonus. I double checked because it said “next” deposit not “first” so I figured I could throw in a small test deposit, then a bigger one to get max value, but the bonus triggered on the first and ignored the second. I didn’t want to push support right away since maybe I missed some fine print or maybe they’re being sneaky.

Has anyone else had this happen with these promos, where they word it just vague enough to trip you up? Did anyone get it sorted or am I just out of luck?