evolutionary correlation between traits

After reading the Collar et al. 2009 paper I am still confused as to what they mean by evolutionary correlation. For example, they introduce the topic by giving examples of how evolutionary correlation can arise by drift or can constrain evolution, and how adaptive radiations can result from the decoupling of phenotypes, thus providing a greater occupation of morphospace.

Then they talk about Centrarchid fishes. The authors hypothesize that because Micropterus specialize on evasive prey they are likely to have a different rate matrix from other Centrarchids. They don't say whether it will be more correlated or less, although it seems to me that they are implying it will be more strongly correlated.

Enter the results. In their two-matrix model the evolutionary correlation in R1 (other fish) = 0.35, whereas the correlation in R2 (micropterus) = 0.801. This implies to me that the two traits are more strongly correlated in micropterus. However, in their discussion, the authors describe this result as...
"the strong, positive association between evolution of gape width and buccal length in Micropterus suggests that changes in buccal cavity size are occurring without modification of shape. In contrast, the low evolutionary correlation between the characters in the other centrarchid lineages reveals that evolution has resulted in modifications to both buccal cavity size and shape."

if change in one trait is occurring without change to the other, as in Micropterus, I feel like this indicates that the traits are less correlated. Maybe its simply the way they are phrasing this which is confusing.