the cast speed I can understand, but cast recovery? The set min and max is 1 to 3. If they have 8 then its either a gm fixed weapon or was made with someone who's skills are set way above 100.0 in both alchemy and inscribe.
Affixing properties overwrites the current value, except for cast speed in this case, which i've posted a fix below. Its impossible to use the same craft over and over on the same item to achieve uber values that are not normally possible.
To fix the cast speed issue open up the spellcraft.cs and find this snippet, should be about line 160:
[code:1]
if ( attr == AosAttribute.CastSpeed )
attrs[attr] += Scale( min, max, low / scale, high / scale ) * scale;
else
attrs[attr] = Scale( min, max, low / scale, high / scale ) * scale;
[/code:1]
simply change it to this:
[code:1]
attrs[attr] = Scale( min, max, low / scale, high / scale ) * scale;
[/code:1]