Skill Point Reset Bug

In an environment with TU1.4.0 applied, I created a new player in Player Career Mode, levelled them up and allocated skill points.

Fig1 shows the skill points allocated at level 4.
When you reset skill points at this stage, a message appears indicating that six points will be returned. (Fig3).
Fig4 shows the screen after resetting the skill points.
The returned points are displayed as six in the upper right corner.
Comparing Fig1 and Fig4 reveals the following changes:
Balance: 71 -> 70
Finishing: 72 -> 70
Acceleration: 74 -> 73
Sprint Speed: 72 -> 70

These changes total 6 points.
However, aggression has increased from 68 to 69.
This means that six points were returned but an extra one point was added.
Isn't this a bug?