About 90% of records i play on my t.92 play perfectly fine. But some records get constant jitter and skips. I've tried to set the anti skate to compensate but it seems like it doesn't even work at all no matter what i set it too. Can someone explain to me what i'm doing wrong?

If the stylus pressure is set up in accordance with manufacturer specs, then the problem lies with the record(s), or the tt arm bearing friction or possibly binding lead wires at end of tonearm..

Exceeding the stylus pressure recommended wears out the disk faster and is not the way to go. Perhaps the disks are very heavily modulated but ....................

Assuming the records are NOT faulty, then the problem might be the set up of the deck. The way to do this is to get one of the skipping records and set it for playing. For the moment set the anti skate to the neutral position or off. If the record is jumping, take it off the record and turn the weight control (on the end of the arm) up slightly just a touch. If you check out out the specifications of the cartridge it should suggest an ideal weight setting for it. If you like you can start with that, before making any more adjustments. If you are starting with the ideal weight and it still jumps, increase the weight by a slight amount and test the record. You keep doing this till the record stays in the groove, but does not rumble. I find headphones ideal for this testing. If it does rumble the weight is too much.
It's a slow process but it's the only way really. You can set the anti skate control after you have got the weight right.
But a slightly worn stylus and a bit of dust can cause a record to jump, but not on all records. Some records are also better made than others too, so would be more sensitive to the wear.