The sign to buy 1,000 Clay is right behind the sign to buy 16 Grass. You probably miss-clicked. We cannot refund, either... Your best bet is to try and resell the clay to users.

 

Actually, this happened before with the cracked stone sign giving mossy brick. He may have a valid point.

 

Right behind Cracked Stone is Mossy Stone.

You guys are simply miss-clicking. They are not giving the wrong blocks. I am in the shop right now looking. The tiniest movement and you will click the sign behind. Tiny lag spike, and you will click it. :b There's no issues. I just bought from both, they're fine. Right behind them are those blocks you guys are saying the signs gave you.

Just gotta be more careful. Try standing at a safer angle. The only one that might have issues are the stone bricks, as they are data IDs (I believe), but I'm highly doubting it right now...

 

Well, just because people have this issue, doesn't mean they are suggesting the sign had the wrong block, it's possible that it's a Minecraft thing, and Minecraft thought that the sign they were trying to click didn't exist or something and it instead went to the next available block behind it or something (Not likely, but whatever.)

 

you are not being refunded.
just make sure you hit the correct sign next time (you can only hit the middle of the sign or you might hit another one).

 

we never give refunds for peoples own mistakes (its not a minecraft/server bug)
I made the same mistake a couple of times and I bet many others have made the same mistake too.
all you have to do is not to be too hasty when clicking the sign and make sure you see the hitbox around the sign when you click or you might misclick and click the other sign.

 

You did it once. do glitches happen 100% of the time? its not certain but thats what errors are for. to report.