Is this correct?

[LearnerP]

Is the following correct in terms of sentence structure?:

"Thank you for pointing out the errors. I have forwarded your letter on to David, who will be able to rectify them.

Thanks in advance.

[Rover_KE]

Delete on and it's fine.

Rover

[LearnerP]

Thanks for that. I wasn't sure if the structure was correct because of the two objects in the second sentence "(letter" and "them"). I wasn't sure if I should refer to the errors as "them" because the first object in the second sentence is "letter" and not "errors". I hope that makes sense..