Time Machine not excluding items

Hi,
I just bought my first macbook, and I have a problem with the Time Machine.
I connected an external hard drive which had some stuff I didn't want to delete, so I partitioned the hard drive to two, one with all the data on it, and the rest (480 gb) I want to use as my backup space with Time Machine.

Time Machine then connected to the right partition, and everything seemed to be working. I then chose to exclude some of my folders from backing up, but Time machine doesn't exclude them for some reason.

I tried looking it up online, and I shut down the Time Machine as suggested (including deleting com.adobe.timemachine... from the library and rebooting), but it did not work.
I also tried verifying the hard drive. The part with the free space (with the 480 GB that I'm trying to backup to) - was verified as ok. The other part (with the old data) didn't give me the 'the disc seems to be ok' message, but I don't really know what to do with that, plus it's not the partition I'm trying to connect the TimeMachine to, so I don't think that should be the problem.

Please help me understand - Why doesn't Time Machine exclude the items I'm asking it to?

Thank you.

ConCat said:

how do you know it's not excluding the items?

Click to expand...

It's saying it's backing up 58GB, and the items I excluded were 50GB total, the rest is the 8GB I actually want to back up (58GB is pretty much everything I have on this computer right now).

ConCat said:

if you only have 58GB, you should probably just back up everything. It'll be a very long time before you even come close to filling up your backup drive. Perhaps years.

Click to expand...

it's only 58 GB right now because it's a brand new computer.
I normally work with very big files (I'm a graphic designer).
and I don't want Time Machine to continuously backup everything I download from the internet.

help?

I think I found the answer. Thanks anyway