How is JB for short-term working calculated?

I am writing an article for my new website [broken link removed]on short-term working and I would like to confirm my understanding. This is what a friend's documentation calcualting her Jobseekers Benefit says.(I am paraphrasing it slightly as it's really badly written)

Systematic Short-time work
"The daily rate is one-fifth of the full weekly rate. If you are on Systematic Short-time work, the number of day's payment you get each week and the number of days you work will not be more than five(5)"

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So if someone is on the maximum Jobseekers Benefit of €204.30, they will get €40.86 per day. If they are off for 3 days in the week, they will earn €122.58.

Systematic short-time working is defined in the operational guidelines as:
The number of days each week is reduced
At least one day per week is worked
It must be systematic - i.e. 2 days on/3 days off, followed by 3 days on/2 days off
Week on/Week off is not classified by Social Welfare as short-time working

Week on/Week off
Is presumably treated as normal unemployment. If you are off for a week, you get a week's Jobseekers Benefit

Casual or part-time
If you are doing casual or part-time work, we pay one sixth of the full weekly rate for each day you are unemployed.

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I take it that this is for someone who has lost their job but gets occasional work from time to time.

So the daily rate would be €34.05

I understand that the working week for such people is 6 days - Thursday to Wednesday (excluding Sunday)

So if you lose your job but get three days work, you will be regarded as unemployed for three days and would get €102.15 (€34.05 x 3)

My friend got €102.20 for three days off which looks like 3 days of casual benefit rounded up? I think she should have been paid at the higher rate?

Jobseekers Benefit is not paid for the first three days of unemployment. Does this apply to systematic short-time workers as well?

A couple of weeks ago i had only three days work so signed for the other three and only got €80.80

it also depends on your circs, re kids claiming spouse etc

my hubby is on jobseekers, would that make a difference?