I've already got unofficial MW patch, do I still need bug fixes in MW code patch?

First of all, Morrowind Code Patch and Morrowind patch are different. Former is an executable which alters morrowind.exe so that fixes which cannot be accomplished using the CS. On the other hand, what you mention as Morrowind Patch project correxcts known bugs via CS.

So I suggest use them both as they address different issues.

Thank you. By the way, is there a mod that balances the unbalanced item enchant values in the origin game? I found it annoying to have a 5 enchant value silver staff. A steel axe could even do better!

I also found something unusual while I was using CS.

Is the extreme low damage that clubs does and the extreme low enchant value of glass weapons part of the games' lore or something?