I have found a number of these 'non-existant' WOEID mappings from Geonames as well. Of 363 GeonameIDs I tried to resolve with the concordance API, 51 of them were mapped to WOEIDs that do not actually exist. Here are a few other examples:
| geonameid | woeid |
| 1136854 | 1924149 |
| 64923 | 1425230 |
| 1146305 | 1917651 |
| 1332083 | 2191069 |
| 1129077 | 1929654 |
| 75508 | 1956160 |
| 2479201 | 1257437 |
| 387410 | 1971088 |
| 1286382 | 1015280 |
Is this expected behavior?