What steps will reproduce the problem?
1. /cast Pyroblast
2. Go to detailed damage breakdown by spell
3. See that there is only one bar with "Pyroblast" on it with damage ranging from noncrit DoT ticks to crit direct damage hits.

What is the expected output? What do you see instead?

The expected output would be two separate bars, one showing direct hit damage, one showing damage over time.

What version of the product are you using?

1.4-3 for 5.0.4 Aug 29, 2012

Do you have an error log of what happened?

No.

Please provide any additional information below.

The crux with this is that both effects share the same name, thus are hard to distinguish.
Here is a possible workaround:

Identify the DoT ticks by comparing damage dealt per occurence. Skada currently features an analysis of "highest" "lowest" and "average" hit.
in the case of Pyroblast everything beneath that "average" would be a DoT tick whereas everything above "average" would fall to direct damage.
That way no damage would be lost on the statistics and still a more detailed display of dps composition would be achieved.