concatif function breaks beforedoubleclick function just by being there?

Hopefully someone can help me with this. I have a tracking sheet (attached) that has many functions, but I'm having trouble with two of them. First of all, I have a Worksheet_Change event set that when a cell is cleared, it fills the cell with a formula to use the record above it as a default value if another cell is equivalent. This worked when I first wrote it, but now it seems to break every other time I use it. When assigning the formula it returns a Method Default/FormulaR1C1/Offset failed error message. It seems to be different for each one, each time and I can't figure out what the problem is.

The other problem I'm having is that I wrote a BeforeDoubleClick event to expand or contract any given record, or series of records. this too worked when I initially wrote it, but now is only hiding one row when it should be hiding eight or more.

I'm not terribly versed in VBA and totally baffled as to why I'm having these problems. As I side note, any ideas to clean up any of the code and make this run smoother (as ther will be many more series added when complete) would be greatly appreciated!

I recall that I had a similar issue with ConcatIf in one of my spreadsheets.

I can't exactly remember the fix, but it was some combination of disableing events (or was it Calculation to Manual?) in the double click routine or explicitly forcing a Calculate at the end of the double click routine.