What is the difference between strength bars and colors?

[c1mth0g]

I have units that are still gold, but showing only one strength bar out of four. On the other hand, I have some that are red but with three stength bars out of four.

Is this a bug or am I not interpreting the colors/bars correctly?

[remoonline]

The skill strength will be dependent on the strength of all words in the skill. You may have a individual words for which the strength is full, but most of the other words in the skill may be in need of practice.

[c1mth0g]

what about the color (gold/red/blue) - is that supposed to mean anything?

[remoonline]

The actual color of the skill before it changed to gold.