I have discovered several mistakes in my family records when the information from original records was indexed. Do you want the corrections?
Ellen, depending on the specifics, the answer may be either "no, we can't do anything with them", or "no, but you can enter them yourself".
As of a few years ago now, some fields of some indexes on FamilySearch can be edited by users (after signing in). If the errors you found are in such an index, there will be an active "Edit" button available in the middle of the black strip at the top of the entry detail page. For example, the name, baptism date, baptism place, father's name, and mother's name are editable on Hungary Reformed Church Christenings (like for my great-grandmother: https://www.familysearch.org/ark:/61903/1:1:VRQR-3TD).
Other indexes cannot be corrected by users, and except for very widespread metadata errors, there is no one at FamilySearch who can correct them, either. (And the metadata errors can take years to fix.)
Your question will be forwarded the Search team for review and assistance. You may be contacted by that team if they need more information. Once an index record has been made public the Historical Records Search team will need to be contacted regarding any indexing errors.