Making a flowchart with DiagrammeR has problems after 9 tabs

[ctheisen]

I'm trying to make a flow chart that has multiple tabs, and everything works well until I get to tab 10. I'm not sure how to format the labels or anything to fix this. Basically everything looks good through th first nine (all the labels come through), but then the labels change to @10 and @11 for the last two. Any help would be greatly appreciated:

library(DiagrammeR)
grViz("digraph flowchart {
      # node definitions with substituted label text
      node [fontname = Helvetica, shape = rectangle]        
      a [label = '@@1']
      b [label = '@@2']
      c [label = '@@3']
      d [label = '@@4']
      e [label = '@@5']
      f [label = '@@6']
      g [label = '@@7']
      h [label = '@@8']
      i [label = '@@9']
      j [label = '@10']
      k [label = '@11']

      # edge definitions with the node IDs
      a->b -> c -> d -> e->f->g->h->i->j->k;
      }

      [1]: 'Bale Conveyor'
      [2]: 'Destringer'
      [3]: 'Conveyor-1'
      [4]: 'Grinder 6in Screen'
      [5]: 'Conveyor-2'
      [6]: 'Grinder 1in Screen'
      [7]: 'Conveyor-3'
      [8]: 'Bunker Storage'
      [9]: 'Reclaimer'
      [10]: 'Processed Corn Stover'
      [11]: 'Reactor Throat'
      ")

[technocrat]

@ctheisen

      j [label = '@10']
      k [label = '@11']

These need @@ not just @