Some programs on Sky History not available on catch up.

[Stuart9964]

I don't know if anybody else is having this problem but lately I have noticed that some programs on Sky History are not up to date on catch up.  I like to watch What On Earth? on Sky History but the last two episodes are not available on catch up and when I record it the episodes don't stack and the square with the picture for each episode is just plain blue.  The same problem also happens with The UnXplained: Mysteries of the Universe with the last episode unavailable on catch up.  Any help or advice would be greatly appreciated.