Okay. So I got this working. I initially set these as counters, but later realized I want gauge.
I changed them to gauge in the gui and some of them worked and some didn't.
In directory: /opt/zenoss/perf/Devices/xxxx
I found that some still said counter in the rrd file.
# rrdtool info DNVR-PLY-TWDelay_DNVR-PLY-TWDelay.rrd
filename = "DNVR-PLY-TWDelay_DNVR-PLY-TWDelay.rrd"
rrd_version = "0003"
step = 300
last_update = 1374696225
header_size = 1832
ds[ds0].index = 0
ds[ds0].type = "COUNTER"
ds[ds0].minimal_heartbeat = 900
ds[ds0].min = NaN
ds[ds0].max = NaN
ds[ds0].last_ds = "31471.0"
I deleted the graphs/datapoints from the gui and found that sometimes the rrd file would be deleted from the directory above and sometimes the rrd file still existed. I had to manually remove some files. I then added a new datapoint/graph in the gui (with a new name and set as gauge). This seemed to clear everything up.
There may have been an easier way to do this, but being somewhat novice I just kind of fumbled through it.