can shakes and shingles go on the same roof- job

Had my roof patched fixed he left 2-3 inch gaps in between the old and new ones good or bad? plus he did not replace all of the missing ones. He put think ones pushing up old flat ones. can wood shakes and shingles go on the some roof mixed? If I could send the pics of the job I would. can you use the same nails - staples in the same places or should you move them? the staples on the top where sticking out all the way 2-3 in out? Just need a nother opinions I never said I was a roofer 2,100 for the job one last thing should there be two workers when one is washing the roof another watching the Carol space looking for Leak’s? If I’m on the wrong sit I am sorry been looking for two day’s with one person coming to look. Thank you for your time. Should say I’m in Yakima was.