Solr range faceting

[Dwane Hall]

Good morning Solr community.  I'm having a few facet range issues for which I'd 
appreciate some advice when somebody gets a spare couple of minutes.

Environment
Solr Cloud (7.3.1)
Single Shard Index, No replicas

Facet Configuration (I'm using the request params API and useParams at runtime)
"facet":"true",
"facet.mincount":1,
"facet.missing":"false",
"facet.range":"Value"
"f.Value.facet.range.start":0.0,
"f.Value.facet.range.end":2000.0,
"f.Value.facet.range.gap":100,
"f.Value.facet.range.include":"edge",
"f.Value.facet.range.other":"all",

My problem
With my range facet configuration I'm expecting to see a facet range entry for 
every 'step' (100 in my case) between my facet.range.start and facet.range.end 
settings. Something like the following 0.0,100.0,200.0, ...2000.0 with a sum of 
the number of values that occur between each range step.  This does not appear 
to be the case and in some instances I don't appear to get counts for some 
range steps (800.0 and 1000.0 for example are present in my result set range 
below but I don't get a range value facets for these values?)

Am I completely misunderstanding how range facets are supposed to work or is my 
configuration a little askew?

Any advice would be greatly appreciated.

The Solr Response
"responseHeader":{
    "zkConnected":true,
    "status":0,
    "QTime":121},

  "response":{"numFound":869,"start":0,"docs":[
      {
        "Value":9475.08},
      {
        "Value":780.0},
      {
        "Value":1000.0},
      {
        "Value":500000.0},
      {
        "Value":50.0},
      {
        "Value":0.0},
      {
        "Value":800.0},
      {
        "Value":0.0},
      {
        "Value":1000.0},
      {
        "Value":1000.0},
      {
        "Value":5000.0},
      {
        "Value":2000.0},
      {
        "Value":4000.0},
      {
        "Value":1500.0},
      {
        "Value":0.0},
      {
        "Value":10000.0},
      {
        "Value":1000.0}]
  },
  "facet_counts":{
    "facet_ranges":{
      "Value":{
        "counts":[
          "0.0",9,
          "400.0",80,
          "700.0",69,
          "1900.0",9],
        "gap":100.0,
        "before":0,
        "after":103,
        "between":766,
        "start":0.0,
        "end":2000.0}}

Cheers,

Dwane