EXP Sign Bug

Minecraft Username:
kylecruz100

Brief Description:
In the EXP store in spawn, I wanted to buy 100 EXP, i clicked the sign and didnt get anything out of it and i still lost the $950

Instructions:

How many times did you recreate this bug?:
1 out of 1 times

Result:
I clicked the Buy 100 EXP sign for $950 and it charged me but never gave me the 100 EXP

Expected Result:

Evidence:
My computer doesnt take screen shots but Zeno tried to help me he is one of my evidence

 

Ye i tried the $100 EXP sign and it doesnt work for me :|