Reproducing a bug is easy breezy

Help. I'm drowning in spaghetti code

I've been working at a working student (15 hours/ week) at a local software company for about a month now... and with everything I learned at college I'm kind of getting eye cancer here.
We still use SVN
We don't have any coding guidelines. No checkstyle, no overview over the program. When I started there I was just giving a ticket and they said good luck.
We just have some basic RCPTT Tests inside Eclipse and most of Themen don't work in the trunk because the gui got changed...
At least we have a ticket system but it doesn't get used by most of the working students.
I found 10 other bugs while reproducing and trying to fix 1 bug.
And I've never seen Java raped so badly. Today I saw a line that started with 6 brackets because whoever wrote it wanted to cast like there was no tomorrow. I see more instanceof in one day than in my whole devlife before.
The only thing we have is two normal employees that review our code before we are allowed to commit it into the trunk.
So yeah... I'm drowning in spaghetti-code.

the funny thing about bugs, they reproduce on their own just fine, and often where you don't want to them. the trick is figuring out how they reproduce so you can work out how to make them stop reproducing. to do that, you have to intentionally reproduce them.