Quick newby RTTS question

[Winged Supreme]

In training, sometimes downward arrows appear in yellow or red. They go away when I train up that stat, but my question is do these appear because my pitcher is struggling or will they always appear if I don't train a stat?

[zomgerd]

They appear after a certain amount of weeks of no training to that attribute, which I believe is 8 weeks, but it will only go down one every 8 weeks from what I saw my RTTS. No training for bunting for me.

Yellow is it will regress soon, red is regressing.