And a little below the flowchart, is this:
“The 5-year period used for determining whether the 10% additional tax on early distributions applies to a distribution from a conversion or rollover contribution, is separately determined for each conversion and rollover, and isn't necessarily the same as the 5-year period used for determining whether a distribution is a qualified distribution. See
What Are Qualified Distributions, earlier.”
Those last 2 sentences seem to say that “conversions do not use the same as the rules in the What Are Qualified Distributions” flowchart.
It also pretty clearly states that each conversion has a separate 5 year period, which “isn’t necessarily the same” rules as specified in the flowchart.