Well all now appears to be well.
I did have to restart the server before any of the test sites saw the new cert so I guess the answer is that Apache does cache it - at least until it expires perhaps.
Thanks to all for the help.
Hopefully I can work with Pete to provide some simpler more comprehensible documentation. IBM's stuff gets into the weeds so quickly and doesn't appear to document the simple normal tasks like just installing a replacement cert.
The new DCM has some nice features, but too many of them are hidden in somewhat obscure places. Sometimes there's a menu option at the top of a page - other times you have to click in the bottom of a box to see the Add/Update/Delete type options. Horribly inconsistent - where is Dennis Schmidt when you need him!
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