One of the most common errors made with preparing a disposable diaper is not setting the center U-shaped channel that helps flow the urine from the target zone either forward or backwards between your legs!
Prior to placing the diaper on! First open it left and right on a flat hard surface with the goal of having the interior of the diaper facing-up!
Now, fold the diaper over itself lengthwise you will note that the bumps show as you view the side of the outer diaper. With pressure, press the along the fold! Working from the center to each outer end, with each press you will note the that bumps reduce slightly.
Now, with care turn the diaper over and one again apply pressure alone the fold from the center outwards to the ends. Once again, you should see a reduction in the bump!
While laying the diaper flat on the hard surface, open it and then stretch it from both ends to assure that the side guards rise and work.
The diaper should have a much relaxed slight lift to each end.
Center and step over the diaper and lift up into its position.
Leaning back into a door frame and use that to let you use both hands to complete the positioning of the diaper and then tap the tabs as normal.
With a finger in side of the diaper press the center gusset down to set the center channel.
Press your legs together to hold and add heat to the diapers gusset, which helps set the center channel.
Repeat as needed to reset the gusset until is stays in place.
FYI: One can consider the bumps as little more than a display of your horse size bits!!