This is more than 2 bumps. You may have used 2 backwards bumps, but forwards bumps also send you forward, but not as far. That’s why backwards bumps are preferred.

While what Lugia said is true, players CAN achieve wrong warp by doing two backwards bumps only, this is referred to as "fast 4-2".

The trick is barely done by a perfect pixel with two bumps

That method is possible, but it's slightly more difficult. It is also slightly faster since you can get to full speed quicker That's the method you also have to do if you wanted to save the TAS 4-2 framerule with 2 bump method