Discrepancies between monthly Statements and cash account.

[#1]

On reconciling my statements with my cash accounts I find that from Aug 2011 the statements reflect more interest than reflected in my cash account. Two accounts are 20% and 12% more than I have actually been paid. In other words if you take the statement totals for interest for tax purposes you could be paying extra tax. Also on one account in July, interest on property trusts is reflected on the statement but not in the cash account. Has anyone else got this problem?