When you removed the paper jam, did you pull the paper out in the direction of print travel? If you pulled against the direction of print travel it is easy to break sensor flags that detect paper jam. Check the jammed paper to make sure all of it is there, if pieces are missing then it may be stuck in the rollers or the sensor flags.
Another problem is sometimes the paper does not move evenly and causes print to skew diagonally. You can clean the paper pickup rollers with a soft cloth with alcohol. Look for the sensor flags, they are narrow plastic parts that are pushed out of the way by the paper and allows the sensors to track movement of paper.