Yes, CERN looks OK now. But I just tried for CL and same issue- says update made but see no change.

This is what I did:
In Edit PurpleChips Symbol Detail for CL
unchecked Add Low/High Valuation
checked Change Valuation
Multiplication Value 0.5
Start Date 2013-03-01
End DAte 2013-05-15

Pressed update Symbol Detail

That should change these 2 entries:
	Edit Detail	Delete	CL	NYSE	95	120	2013-05-08
	Edit Detail	Delete	CL	NYSE	92	112	2013-03-16

But see no change in entries nor on chart