I’ve had a similar situation before so understand the frustration. It’s a question of balancing speed vs flexibility — as @anon55189575 mentions, if you were wishing to top up to the maximum amount (or even any relatively high amt) that would be hundreds of taps, which is far too much, but of course there are instances like yours where you end up trapped in between two ‘almost’ amounts. As time goes on we learn more about how and when people top up, plus introducing sophisticated budgeting inside of the app, I think we’ll able to challenge and fix issues like this.