What should happen? Looks correct, but weird, no?

gistfile1.txt

{set,{var,1},{call,crdt_statem_eqc,create,[riak_dt_multi]}},
 {set,{var,2},
      {call,crdt_statem_eqc,merge,[riak_dt_multi,{0,{var,1}},{0,{var,1}}]}},
 {set,{var,3},
      {call,crdt_statem_eqc,merge,[riak_dt_multi,{0,{var,2}},{0,{var,2}}]}},
 {set,{var,4},
      {call,crdt_statem_eqc,update,
            [riak_dt_multi,
             {update,[{update,{<<>>,riak_dt_vvorset},{add_all,[]}}]},
             {0,{var,3}}]}},
 {set,{var,5},
      {call,crdt_statem_eqc,update,
            [riak_dt_multi,
             {update,[{update,{<<>>,riak_dt_vvorset},{add,2}},
                      {remove,{<<>>,riak_dt_vvorset}}]},
             {0,{var,4}}]}},
 {set,{var,6},
      {call,crdt_statem_eqc,update,
            [riak_dt_multi,
             {update,[{update,{<<>>,riak_dt_vvorset},{remove,2}}]},
             {0,{var,5}}]}}]


which is:

48> M = riak_dt_multi:new().
{{[],[]},[]}
49> {ok, M2} = riak_dt_multi:update({update,[{update,{<<>>,riak_dt_vvorset},{add_all,[]}}]}, a, M).
{ok,{{[{a,1}],[{{<<>>,riak_dt_vvorset},{1,[{1,1}]}}]},
     [{{<<>>,riak_dt_vvorset},{[],[]}}]}}

54> riak_dt_multi:value(M2).
[{{<<>>,riak_dt_vvorset},[]}]

56> {ok, M3} = riak_dt_multi:update( {update,[{update,{<<>>,riak_dt_vvorset},{add,2}},
56>                       {remove,{<<>>,riak_dt_vvorset}}]},a, M2).
{ok,{{[{a,1}],[{{<<>>,riak_dt_vvorset},{0,[{1,2}]}}]},
     [{{<<>>,riak_dt_vvorset},{[{a,1}],[{2,{0,[{1,1}]}}]}}]}}
57> riak_dt_multi:value(M3).
[]

58> {ok, M4} = riak_dt_multi:update({update,[{update,{<<>>,riak_dt_vvorset},{remove,2}}]}, a, M3).
{ok,{{[{a,1}],[{{<<>>,riak_dt_vvorset},{1,[{1,3}]}}]},
     [{{<<>>,riak_dt_vvorset},{[{a,1}],[{2,{0,[{1,1}]}}]}}]}}
59> riak_dt_multi:value(M4).
[{{<<>>,riak_dt_vvorset},[]}]