Heads up - Broadband Your Way billing error

[#1]

Have just received my plusnet bill for next month and the included data charge has been billed twice.
See
Invoice Number 14625424
Date 23/01/2009
Customer  cjags
1  Account Billing (2009-01-23 to 2009-02-22)  £8.48  £1.27  £9.75
1 3GB Included Data Transfer Charge From 23/01/2009 £0.85 £0.13 £0.98
1 3GB Included Data Transfer Charge From 23/01/2009 £0.85 £0.13 £0.98
Net Amount £10.18
VAT Amount @ 15% £1.53
Invoice Total £11.71

[#2]

Morning,
I honestly can't see any reason why this has happened.
I'll get a problem raised to our finance team so we can make sure that this hasn't happened to anyone else.
I've discounted your next invoice by £1.  I'm very sorry that this happened in the first place.

[#3]

Cheers.
My broadband usage figures seem a bit strange too.
Last month's paid for usage finished at 3.7G but it was only 1.4G a week ago.
Not sure how it suddenly shot up.
Also this month is showing off peak usage as  -2428.74KB  !?

[#4]

Yes, that does sound a little strange.
Did the daily figures tally, or was it just the total that didn't seem to add up?

[#5]

The other totals seemed OK.  It was just the off peak total that seemed bizzare!