[Python] Ruamel.yaml, extra dict items getting adding past comment? [duplicate]

I'm trying to use ruamel.yaml to update some configuration files. While this does work, I can't seem to get it entirely right. Specifically, I'm trying to add key/value to an existing dict, with the intention of having it added at the end. Demo code:

from ruamel.yaml import YAML
yaml = YAML()
yaml.preserve_quotes = True
yaml.indent(offset=2)

raw = """---
# Some config file..
# This is the main clients config
clients:
foobar1:
name: foo Bar 1
auth: false
count: 1290
barboz:
name: BarraBoz
auth: true
count: 19


##############################
# here be the other items #
##############################
archives:
ral1: false
ral2: true
customers:
- None
- Foo
- 5
bazo:
new: key

# More junk below
inventory:
- egg
- shell
"""

vanhelst = {"adfs": 124423423, "123": "adsfadsfasdf", "name": "Dirk Van helst"}


data = yaml.load(raw)
data["clients"].insert(len(data["clients"]), "vanhelst", vanhelst)

# Write to file
with open("/tmp/out.yml", "w") as f:
yaml.dump(data, f)


The gives me:

# Some config file..
# This is the main clients config
clients:
foobar1:
name: foo Bar 1
auth: false
count: 1290
barboz:
name: BarraBoz
auth: true
count: 19


##############################
# here be the other items #
##############################
vanhelst:
adfs: 124423423
'123': adsfadsfasdf
name: Dirk Van helst
archives:
ral1: false
ral2: true
customers:
- None
- Foo
- 5
bazo:
new: key

# More junk below
inventory:
- egg
- shell


But my intention is to end up with this:

# Some config file..
# This is the main clients config
clients:
foobar1:
name: foo Bar 1
auth: false
count: 1290
barboz:
name: BarraBoz
auth: true
count: 19
vanhelst:
adfs: 124423423
'123': adsfadsfasdf
name: Dirk Van helst


##############################
# here be the other items #
##############################
archives:
ral1: false
ral2: true
customers:
- None
- Foo
- 5
bazo:
new: key

# More junk below
inventory:
- egg
- shell


Inserting it at any other place does work, but I'm looking to add it at the end.

inserting does add it at the functional end, but it is still after the comment that belongs to the next key....

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