Students MUST keep their photo paper inside their paper packet with BOTH bags closed. The clue is the white boarder which should be clean white on good paper. This should not happen, but is another of the most common errors in our lab. The enlarger just was NOT in focus. To focus, be sure the enlarger is set to full brightness, then turn the focus knob up and down looking at the middle tones of gray to see when they get the sharpest.
Contrast is effected by how long film is developed or by agitation of the film.
In the print process contrast can be lost with an overexposed print that is yanked from the developer before the full 90 seconds is up. This print is actually a test strip that was moved during printing. Moved enlargers, film or easels can blur a photo. There also is a large finger print in the upper left that comes from wet hands handling paper and touching the emulsion before exposure. Clean and dry hands and handling from the edge help cure this and as for the motion - be careful not to bump the enlarger or easel during exposure of the print.