As we all know, BFBB - Rehydrated has collectibles - Golden Spatulas, and Patrick's Dirty Socks. I know I am technically late as others might have already figured about this, but let me tell this anyway:

The game does not exclusively check which collectible is collected as unique. That means the game will only continue to count if you collected something, basically:

• Collecting 100 Golden Spatulas does not necessarily haveto be unique! The game counts golden spatulas collected from different saves as different item instances. So if you collected 10 on 1st save, and 20 on second save? The achievement tracker will tally it up into 30! Yes, I tested it.
  
  
• Same goes to Patrick's Socks! 20 socks from 1st save and 35 socks on 2nd save? The achievement tracker will count them as 55 socks!
  

That being said, this only affects the achievement tracker here on Steam - the game will still reflect different on what you collected per save, so take note of that.

In my own opinion, if the game lets it, it should be fine. If you want to truly complete the game properly, much better. But for some that struggles to find the socks for the achievements, this guide should help you.

One more thing: The achievements are indeed buggy in terms of being triggered, hence the image below: They were triggered out of order.