double tap moves

Currently working on side dodges, and they mostly work ok.

I noticed one thing though, each dodge,  left or right, has an input command, up,up or down,down.

If I press and hold the up key, then hit down, it triggers the dodge, technically without the correct input.
In that case, it would be triggering with the command up,down or down,up.

Anyone know a way to fix this? It's not a crippling issue, but it makes the controls less precise.