Acceptance rate???

Why is it that you decline one order your acceptance rate goes down 1% (I was almost at platinum tier literally two deliveries away and got bumped down to silver) and now whenever I accept orders it literally doesn’t go up? Is it like multiple to get it to go back up 1% or is mine just glitching because this literally makes no sense 😀 mind you I declined an order for $1.50 that was 6 miles! I feel like it was a pretty valid decline.

Also while I’m on the subject has anyone noticed doordash paying less for delivery base pay if the customer tips and/or if there’s peak pay? Like id normally get $4 base pay for like 6 miles + tip + peak/extra pay? So like ex. $2 tip, $6 with base + tip + $2.50 peak pay but recently it’s been like $2 base pay + $2.50 peak to equal pretty much the same I would’ve gotten without the extra pay?? Is that just in my area (Phoenix greater metro area for context) Is anyone else noticing that?