The Reference Desk/Story numbering

I am confused about the story numbering. I love using tardis wikia to help me organize my doctor who television information. Often the story numbers don't jive with other websites, but I tend to accept them here as accurate. But recently one thing has me confused. There is a TV story numbered 238 (The Name of the Doctor) and 239 (Day of the Doctor) and 241 (Time of the Doctor) but no 240?

The list on wikipedia shows 239 as Name of the Doctor, 240 as Day of the Doctor, and 241 as Time of the Doctor.

It seems wikipedia started differing back at story 219 which it calls Let's kill Hitler, which tardis wikia lists as 218b.

So is there an error or is it just myself that is in error?

Thanks