#1 does sound like under-development. Is it possible that your developer was old? Does it look brown?(posted 8989 days ago)#2 sounds very similar. Make a test with the fixer: Put some undeveloped piece of film into it, and measure the clearing time. It it exceeds 3 minutes, use fresh fixer instead. If it is less than three minutes, use twice that time for fixing your films (three times that time for T-Grain films).
Such would be the suggestions if the problems were uncorrelated. As the problems sound so similar, one should, however, consider a common cause. It could be insufficient circulation of the chemicals around the film. The most trivial cause for this might be the wrong method/rythm of agitation with the correct time. If your reels allow it, try to look between the film layers to see whether there is sufficient space, when you take the reels out of the tank after processing.