...prior to making the first 10.11 clone, ... first delete & then recreate all the scheduled backups.
... don't understand the purpose in doing so, since SD! v2.8 is compatible with Yosemite.
... are the prior, referenced backups solely related to scheduled ones as opposed to ... manually initiated?
The details/explanation re why the schedules need be deleted and then recreated are best explained here.
Your link was the same as in one of the links I previously provided and IMHO, Shirt-Pocket's 9/13 blog post didn't address my question.
Nonetheless, here's detail now on Shirt-Pocket's v2.8 download page, which doesn't mention having to delete anything prior to either a Manual or Scheduled clone: v2.8 Download
