new CSA system help please

[chocolatespiders]

An attachment of earning was in place at £20 a week from my daughter dad. 2 months ago I asked for a new calculation and it was assessed at £43 a week. Great i thought things might start to get easier.
Yesterday I received a letter from CSA saying from December it is being changed to the new system as

• Mr X has been named on a new application for child maintenance to the child maintenance service - this is understandable as he has another child with his wife and they split up last year and I think they must have had a private arrangement and now he has to pay more to me has decided to declare the other daughter to the CSA so it is divided.

• Mr X lives in a household where they and another non-resident parent both receive state benefits and the other non-resident parent has been named in a new application for child maintenance to the child maintenance service.

As far as i know he works full time and recently saw him advertising for a lodger. Could the lodger having a case with the CSA affect mine?

so confused about this and really dont want to have to ring them.
Can anyone shed any light on this please

Any change in the non resident parents employment circumstances would be taken into account. However if the lodger is a non resident parent I can't see how it would make any difference. It could be different if the lodger was a parent with care.

Yes but a lodger paying rent will be classed as income and has absolutely no bearings on a CM claim as he/she is nothing to do with the Non resident parent in regards to relationship.

He is pulling a fast one.

Under the Child Maintenance Service rules taxable income is used to calculate child maintenance. There is an automatic exception from tax if someone earns up to a threshold of £4,250 per year tax-free from letting out furnished accommodation in their home so it isn't considered income for child maintenance purposes.

I think this is the way they are gradually transfering cases from the CSA; if/when a variation in circumstances occurs, they move the case from old to new.
The application from his exW for CM for his DCs with her will have triggered the "changeover".

With regard to the lodger, I wonder if that's a coincidental "mistake", which has happened at the same time; when I notified my change of address with the CSA, they automatically linked cases and reviewed/recalculated the CM liability of the other adult in my new home - but, it shouldn't be linked unless the adults are cohabiting, rather than house sharing!