ChemFinder returns a maximum of 2500 hits, when I know there are more.
If you want to change the number of hits that ChemFinder returns, you can do so by editing the cfw.ini file found in your Windows (or WinNT) folder. Go the Start menu and choose Run. Type "cfw.ini" (without the quotes), and press Enter. This should open your cfw.ini, which is a text file. In this file, set the "MAX_HITS=" value to what ever you like or 0 for unlimited hits.