Oil Leak still after same shop repaired/replaced Cam shaft

What is your question?

After 3 separate times taking my car back to the same shop who did the initial replacement of cam shaft I still have a small leak. I placed a flat cardboard box under my car this week and still have a couple of spots. The last time I took it back the owner said they just didn't tighten the oil pan bolt enough. It's still leaking! Please offer any suggestions or is this another leak? Thank you!

What makes this problem better or worse?

Smells like burning oil a lot. Not losing oil, oil level remains the same.

How long has your 1995 Honda Civic had this problem?

Six months or seven months