Defective DVD?

For some reason, it seems as if all the Japanese sci-fi double features from Retromedia have a similar playback problem, based on my own purchases, as well as the reviews I've read. I recently picked up their DVD double feature of RETURN OF THE GIANT MONSTERS/THE MAGIC SERPENT, the third Gamera volume from this company. As with the previous two DVDs (DESTROY ALL PLANETS/ATTACK OF THE MONSTERS and GAMERA VS. MONSTER X/MONSTER FROM A PREHISTORIC PLANET), the transfers looked pretty decent, and for what you get the price is nice. However, like the two previous Retromedia releases, one of the features wants to freeze up while it plays. In this instance, the second feature (THE MAGIC SERPENT) freezes up about 10-15 minutes into the film. After the problem was brought to their attention with their first Gamera release (DESTROY ALL PLANETS/ATTACK OF THE MONSTERS), it would seem something would have been done to correct/prevent any further such occurrence. None of their other releases seem to have similar defects....