Roof tile problem or not ?

[richierich]

Hi everyone. Just been having our bathroom transformed and in the process was able to view from inside the perished roof felt around dormer. Having had a roofer come out to re new felt I'm now worried about the way some tiles have been replaced. See picture of top left of dormer, whilst tile is over lapping the tile below it appears to be not butted right down as was before the roof work, this tile is the worst offender but there are six more. The roofer did come back but after 20 minutes of trying to re adjust he said, "it'll still do its job, no problem". So am I being to picky expecting the old roof tiles will go back exactly the same, all straight and nicely butted on to each other, or should I be concerned?