what yer experiencing is typical of the spanish guns - lack of quality control, and why they're so cheap.
it can be fixed, i've done it. take off the hammer, vise it, heat it with a propane torch and use vise grips and/or a hammer to bend/bang it into correct position. won't take much effort as it appears it's off only by a little. this will remove the color case look and turn the metal into a straw color. you can re-blue it or leave it.
it, like all the other offshore guns (for the most part) have patent breeches, so you'll need a .22 brush and patch on yer cleaning rod to clean out the ante-chamber. if at all possible, remove all threaded parts and lube with anti-seize, to make life easier later on. good luck with the gun.
oh, the hooked breech ... it's a matter of fit - do whatever you need to do to make it all work well. this might mean opening up the stock's tang screw hole, or removing other areas of stock wood to make it all fit together well. once again, the manufacturer just throws a buncha parts in a box and it's up to the builder to make things fit ....... and work.
