Welcome to the forum (and sorry no one replied - but you posted in the wrng section).
What blanks have you used exactly (brand + model + download DVDIdentifier and post the ID/mediacode of the disc).
Most issues with skipping, stuttering etc... are cause by low quality media or low burning quality from the burner.
You should use reputable blanks like Sony, Verbatim, Plextor.
If you mention your burner exact model and firmware version, it would be easier to help you.