Missing achievements

Hi,

Not sure if his has been covered elsewhere but how come it shows I have less unlocked achievements on here than it does on my steam profile?

TSA: 1902
Steam Unlocks: 1947 (http://steamcommunity.com/id/penguin_alex)

It's been bugging me because I can't figure out which are missing and/or why??

Same for me, I have 16,870 achievements on here but 19,475 on my steam profile...

Same, I have 3481 here, but 6499 on steam...

I found that some games are here declared without achievement.
for example, Out of Reach has steam achievements, but the site is not picking them. This could be the reason why you are all getting mismatching numbers.

edit: I am listing below games that I found to be in the same case
Out of Reach
Rust
Space Engineers
Stronghold 2
Two Worlds II

Out of Reach, Rust and Space Engineers should all now have achievements.

Stronghold 2 is now known as Stronghold HD Achievements which doesn't have achievements. Two Worlds II is know known as Two Worlds II HD Achievements where it's achievements should be showing on it's page.

Actually I do own Stronghold 2, and it has achievements.
Stronghold 2 & Stronghold HD are 2 different entries in Steam (I do have both).

Thanks for your continuous work into improving the site's database.

another two without achievements:

Dig or Die
Castle Story