When the appeals were registered might not be relevant IMO.
In the first instance, the key issue is the dates of the respective NoRs and CCs.
OP, I can't access this info in your drive link, could you just set them out here pl.
PCN NOR dated CC issued
*** **** *****
etc.
When a NOR is served, the authority is prevented from serving a CC in 2 circumstances:
1. Until a period of 28 days beginning on the date of service has expired. Nothing to do with registering an appeal as such because this period applies whether an appeal is registered in time or not;
2. If the 28-day period has expired and the council is notified that an appeal has been registered. In such cases, the council has not committed a PI if they issued the CC before being notified. This comes under the heading, 'that's life'. But if they did not act upon the notification and issued after this was received by them, then it's curtains IMO.
Some councils are risk-takers and look to serve CCs at the earliest opportunity so they work out the day after the end of the period, count back two working days and plan to issue CCs on those dates. The risk they take is that they're exposed if the recipient submits their appeal in that interval.
Of course, if they miscalculate the end of the 28-day period......