Incorrect default date?

Hi, my credit file log has the following listed against a Lloyds account
(G) = Green i.e. OK

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J

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F

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M

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A

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M

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J

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J

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A

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S

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O

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N----D

1010 |-ap-|--ap-|--1---|--1--|--2---|--2--|--3--|--4--|--4-- |--4--|--D-|

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2009 |-ap-|--ap-|--ap--|-ap--|-ap--|-ap--|-ap-|-ap--|--ap-|--ap-|-ap-|-ap--|
2008 |- G-|--G--|---G--|--G--|--G--|--G--|--G-|--G--|--G--|--1---|-2--|--3--|

AP is when I entered a DMC where token payments were paid. £2 a month I think.

The default was logged in November 2010 (as can be seen above)
I complained in a letter about this as the default should have been logged in March 2009 (six months after the first late payment as arrears were never cleared)? Am I correct about this? If not, then at least it should be 6 months into the DMC period which is June 2009

I got a response saying that they would change the default to October 2009 with a load of blurb I didn't quite understand. Is that right? Should I still contest it go get it moved back further still.

Also, when in the response letter they said they would change the date and that it could take up to 6 weeks. After almost 2 months they have done nothing.