sure enough, you're correct.
Alright, lets solve this; things to check:
1. What program are you using to make the contours, global mapper?
2. If it is global mapper go to tools>configure> the vertical options tab; make sure elevation display/export units is statute (ft). I would bet that is the main problem
3. Remake just the broken quad and check it.
The other thing is to try out my beta topo process program.