Dishonoured cheques

Hi,

I am a bit confused about recon. and adjustments made with regards to dishonoured cheques…Why the cash book is is deducted by the amount in this case; cash balance is £2490 and the dishonoured cheque £140. New revised balance is £2350. Which makes sense to me. However in other example…the dishonoured cheque has been added to cash book balance, the example is as follows;
Cash book balance shows a bank balance of £565, a cheque for £92 from a customer has been dishonoured. the correct answer as per the Kaplan book is £657. Do you know why?

Many thanks
Val