Postpadding reverts to 2

[Nistrod]

Australian TV channels are notorious for not sticking to the EPG recording times. As a result, I have a post padding of 15 mins.
This is in my Config.xml

Code:

<PostPadding>15</PostPadding>

Sometimes, however, I find in my recurring-backup.xml a series recording with a post padding of 2.
It is NOT being set manually, and I can't work out whether it changes sometime, or is initially added this way.

It is not frequent, but is annoying, as it is usually detected when a show finishes unexpectedly on playback.
Any ideas?

[johnsonx42]

AFAIK the PostPadding setting in Settings/Config.xml only applies to newly created recordings. It won't change existing recurring or single recordings.

[Nistrod]

Yes, this was my understanding.
So why do some (and only some) of my recurring recording entries go back to 2?