I just recently got 2 lucky miners in my possession, and wanted to join this pool. However after a great start and devices started hashing, they just stopped working or are acting weird. Am I missing something?
Unfortunately more info is needed to be of any help here (ie what miners are you using, for how long have you been successfully using them, etc.).
You say they suddenly stopped working, or acting weird (is it overheating, making new sounds, etc) - could be a manufacturing issue w/your miners or local issue to your site (Internet, heat).
Other useful info (if we are to be of any help):
Do you see your miners at your wallet address?
If so, are your miners successfully submitting shares?
If so, are they hashing at the expected rate/speed?
Pardon for not providing more tangible advice/help right now, but there just not enough info..