Congratulations, Mr. Eder! You must've been very happy for getting that copy!
Back to the subject. I have this recording in my collection and the 4th track sonic-wise is indeed dull. As if it was done intentionally to be vintage and "wall-of-sounding" (the voices are messy, they're like some mixture), don't know how to explain. So no, you haven't got a bad copy, I guess this case is on all The Marksmen's recordings.
Sadly I didn't get to meet Dave but they were selling them at the shows and I had always wanted to pick it up. Wish they had his other rare CD's there too! Thanks for the info everyone. Glad my copy is good. I was able to find the "I Wanna Cry" and the Sundazed 45's but I can't find those other singles anywhere. This is rare stuff indeed.