The question has 3 distinct parts.
1 - non compliance which should be recorded at AGAR.
2 - staff work load management issue with an indication that the employer / employee relationship is perhaps not wholly understood by cllrs and or clerk.
3 - if others seem unconcerned there may either be a lack of suitably qualified and experienced cllrs or that they are insufficiently engaged.
in that order, it is the ICOs model publication scheme against which an organisation might be judged to be compliant / non compliant with statutory publication requirements link:
Cllrs should be aware of this, the clerk is paid to be aware of this and so is the internal auditor. If it is felt that the clerk has insufficient time to fulfil fundamental tasks then they are either inefficient or they have insufficient contracted time to undertake what should be stated within terms and conditions of employment.
If the internal auditor is either unaware of the the ICO MPS or failing to highlight non compliance within their observations / interim reports - then what are you paying them for? Get rid!
Having a non compliance entry on your AGAR (should) act as a wake up call for cllrs - it’s not something to be afraid of, it’s an acknowledgement that some parts of a system are not as might reasonably be expected it is the starting point for remedial action.
It sounds like there are not enough cllrs ‘bought in’ or understanding what is required, that (possibly) the tail is wagging the dog in the employee / employer realm and that staff oversight, prioritisation of tasks and time management is insufficient in managing staff.
Are you a new arrival amongst longer standing incumbents?
Quite a challenge to update and improve entrenched sub optimal habits.
Those that rely upon ‘experience’ as an argument against improvement often fail to realise / recognise that ‘experience’ is only useful if it is GOOD experience - there is considerable potential for harm where BAD experience is perpetuated by those with behavioural aversion to change.
Good luck (in a Liam Neesom ‘Taken’voice)