Ptinting images.

I have only been working with photoshop for a short period of time. I know now that it's not anything to do with photoshop. Here is my problem. During the summer I started to scan a large number of pictures. They were all take over the years with 35mm camera which wasn't a digital . some of these pictures are anywhere from 40 plus year old black and white pictures which I have no idea the type of camera they were taken with, to 35mm color photos I spoke about were all taken by me and my wife. I then got a injet HP printer so we could print the ones we like best. I tried printing them and the color came out just fine but the image was distorted. It is almost like I had used the transform tool on them and of course, I did not. The reason why I likened it to the transform tool is because it looks like it was scaled in the horsontal direction and the people all look way to thin than they are. the same in the vertical where they appear taller and thinner than they are. When I say scaled, I mean to the point that it is almost laughable. Now in my photos it works for me because I have enough girth to work with. LOL But, in the case of 110 lbs women and children it looks freaky. I took the same .jpg files that I scanned and got this effect from and uploaded them to Walgreens.com and then to walmart.com. I got the same thing from both of them that I was having from the ones that printed. Does anyone know what may be causing this?? I would really like to hear from anyone. Thank you.