Hi,
The offset might happen due to the fact, that because how you have selected the information, the scraper does not recognize which items should be grouped together, that is why, if there is any inconsistencies in the data, you might get a faulty result.
Next time, try using the Element selector first, to group the items together in a manner you would like them to be extracted.
Here is an updated sitemap that should work:
{"_id":"ligasantander","startUrl":["https://www.mismarcadores.com/futbol/espana/laliga/resultados/"],"selectors":[{"id":"Local","type":"SelectorText","parentSelectors":["score-element"],"selector":".team-home","multiple":false,"regex":"","delay":0},{"id":"Visitante","type":"SelectorText","parentSelectors":["score-element"],"selector":".team-away","multiple":false,"regex":"","delay":0},{"id":"Resultado","type":"SelectorText","parentSelectors":["score-element"],"selector":".score","multiple":false,"regex":"","delay":0},{"id":"score-element","type":"SelectorElement","parentSelectors":["_root"],"selector":"tr.stage-finished","multiple":true,"delay":0}]}