UFW doesn't seem to manage iptables

Here's what I first started with in ufw:

sudo ufw status verbose
Status: active

Logging: on (low)
Default: deny (incoming), allow (outgoing), deny (routed)

New profiles: skip
To Action From

-- ------ ----
6xxx/tcp ALLOW IN Anywhere

(6xxx is my ssh port, obviously not posted here.)  But I find that I can browse the default Apache page at 54plymouth.net; that is, access to 80 is permitted.  I then explicitly added a deny to ufw (which didn’t work):

sudo ufw status verbose
Status: active

Logging: on (low)
Default: deny (incoming), allow (outgoing), deny (routed)

New profiles: skip
To                         Action      From

--                         ------      ----
6xxx/tcp                   ALLOW IN    Anywhere

80/tcp (Apache)            DENY IN     Anywhere

Each time I disabled/enabled ufw to reset the rules.  I'm not sure what things mean in iptables, but here’s what's in it:

ACCEPT     tcp  --  anywhere             anywhere             tcp dpt:http /* User defined open TCP port */ ctstate NEW
ACCEPT     tcp  --  anywhere             anywhere             tcp dpt:https /* User defined open TCP port */ ctstate NEW

DROP       tcp  --  anywhere             anywhere             tcp dpt:http /* 'dapp_Apache' */

I'm guessing the two ACCEPTs are taking precedence over the DROP, which suggests it's the one I added, given the common Apache reference.

So - what do I have to do, to make iptables track exclusively what's declared in ufw as allowed/denied?

-Dan