Confused about price increases

[#1]

I can't work out when the price increases come into effect. My itemised bill for period 21/04/09 to 20/5/09 has the increased package price of £10.95 (Anytime 240), but call feature price of £1.47 instead of £0.99 for caller display.

[#2]

Hi Maranello,
It looks like you're going to be billed 99p for your caller display.
Mind sending me a copy of the invoice you're referring to?  It looks like you might be talking about the month before.

[#3]

Hi Jameseh,
I haven't got an invoice yet, was just looking at the itemised bill in the Home Phone part of the Member Centre.
I don't know if this link will work
https://portal.plus.net/plustalk/index.php?page=wlr_itemised_billing&intProductComponentContractID=5...
if not, here's a text version

Quote

Billing period: 21/04/2009 to 20/05/2009 Product: Home Phone Anytime Calls: £0.23 Call Features: £1.47 Line Rental: £10.95 TOTAL: £12.65

[#4]

Yep, that's last months.

[#5]

So why £10.95?

[#6]

Weird.
I see:
(Future invoice)
10.95  2009-05-21  Home Phone Anytime charge for the period 21/05/2009 to 20/06/2009
and
(Previous invoice)
Home Phone Anytime charge for the period 21/04/2009 to 20/05/2009  £8.48  £1.27  £9.75

[#7]

Exactly.
If I understand correctly, Line rental and call features are charged in advance, so current itemised bill (21/05 09 to date) is correct. Previous bill (21/04/09 to 20/05/09)seems to have the line rental increase but not the Call Feature decrease, but in any event the invoice (21/04/09) charged correctly (except for the spurious Anytime+ charge which has since been refunded).
So I should expect my next invoice to have the £10.95 + £0.99 of the current itemised bill, plus the call charges from the previous bill.
Edit @ 13:20 - Latest invoice has now appeared and is correct, almost exactly as I expected except with referral discount and BB subscription included.