Vega Sicilia Unico 2012, seepage

Guys i just had a case of 2012 Vega Sicilia Unico delivered today.
2 out of 6 has stained on the labels. could be a seepage the main culprit of this issue?
bottles were shipped via air, i suspect pressure changes caused the seepage. i have checked one by one none indicates any seepage on arrival.

Does the bottles will automatically goes bad? or will it regain its closure capbility after a while

Many Thanks in advance :grinning: