Well, there are actually several problems. We are talking about this address: http://www.openstreetmap.org/node/944775313 One problem is that there are actually 3 house numbers linked to one: 'addr:housenumber'='1514,1516,1516 BIS' and during conversion we cut it to 10 characters. If comma is standard way in OSM we will have to split it into 3 house numbers records on our side.
The second problem is that this house is also part of relation: http://www.openstreetmap.org/relation/1218272 where are streets with different name, in particular Charrua . For conversion relation is stronger than what is filled with the addr tag so the name is replaced by Charrua ... and then it is rejected that it is too far.
Thanks for such detailed analysis and explanation! I understood both problems. After your explanation I've tried searching "Charrua 1516" in MapFactor with no results (as you predicted because you said "it is rejected that it is too far") but also I've tried searching "Charrua 1516" in OsmAnd which pointed in the map the address I was looking for (Ponce 1516).
Is there a way that MapFactor could solve these problems in the near future?
Are there really some house numbers linked to the problematic part? I would remove it from the relation.
In mean time I found, that for Relation:street name is required while fro Relation:associatedStreet tag "name" is only optional and name from street member is used.