For example:
In planner I've have and planned workout with weight 27.5, but when I done my exercise, I confirming the reps q-ty, 5(for example) and next I should confirm the weight. Here, if weight something with .5 Kg watch rounding it to 28 Kg, thus, I need to fix it instead of only confirming. But, if planned weight without the fractional part, everything is work as expected - planned 97 Kg, confirm the reps - OK - confirm the weight - 97 Kg - OK - Done.