$11,000 on the Form 1099-R is correct. You converted $11,000 in 2018, so no part of these Roth conversions was reportable on your 2017 tax return. Only the traditional IRA contribution for 2017 was reportable on your 2017 tax return, either as a nondeductible contribution on Form 8606 line 1 with the result of $5,500 appearing on line 14 to carry forward to line 2 of your 2018 Form 8606, or as a deductible contribution on Form 1040 line 32 or Form 1040A line 17.
If you somehow reported this first Roth conversion on your 2017 tax return, you must amend your 2017 tax return. If your traditional IRA contribution for 2017 was a nondeductible contribution and your 2017 Form 8606 did not report the traditional IRA contribution correctly, you must amend the 2017 Form 8606. If you reported a Roth IRA contribution for 2017 that you did not make, you may have to amend your 2017