I'm having a real hard time lately with my focus. I thought all along it was my new lens but now it's doing it to my 50mm too. I think my camera needs service

Yesterday I put the lenses on my old Pentax IST and i'm getting much better results. Here are some test shots from yesterday. Cc appreciated as i'm working on a new system and monitor.
1.studio shot of Shelby. She looks so much older than 6 (sigh)
and a walk around the block with Landan
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and these are from the weekend, unfortunately these are only a few of the ones I was able to save because of my back focusing issues
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11.Landan's newest thing
TFL!
oh yes, and I got my biopsy date set for next wednesday the 17th.