Brake fluid seems to be leaking where the brake hose connects to the rotor. Do I need to change the hose or is there a larger problem?

No ,it should not be there,and leaking.May need to replace the caliper.

I actually just replaced the caliper a few hours ago.

One more question?Did you replace the brass bushing at the line connector?

Should be two brass bushing,s where line hooks up to caliper,one in front and one in back.

If slit is in the line,you will have to replace it.

I did not replace the bushing. That is where there is a small slit. Could this be the reason?