Hi Aaron,
Ive used a DC4 (used to have a DC3 now in Iraq) extensively on many kinds of blade and never had a problem with either of them. I feel confident that if you email Peter or Eric at Fällkniven with details of the problems you mention that they will sort it out without any quibbles. Ive always found Peter to be a stand-up guy in respect to any personal contact Ive had with him, and Im sure that the same would apply to Eric.
Best regards,
Paul.