At 1:05:01, as the actor awakens and dons clothes, the siren (added in post-production) changes from air raid to fire. The Director can plainly be heard off screen cuing the actor with "Fire" just before the actor says it.
Just before Steve and Jane attempt to hide in the freezer, Steve grabs a black steel pole leaning on the wall and hurls it at the Blob; when they come out again, the pole is back where it was originally.
When the doctor pulls back the blanket off the old man, it is clearly visible that the blob is oozing on to the old man's chest. Then on the closeup, the blob is only on the old man's hand and arm. The next long shot shows the Blob over the man's chest again.
While the Blob consumes human flesh, the clothes of the victims should have remained as clear proof that something happened to those people. If it had the power to dissolve anything it came in contact with, it should have dissolved the wall and carpet in the theater, and the diner as it climbed over it.
When Steve and Jane stop to help the old man on the road, The Blob is covering the old man's right hand. The Blob is supposed to absorb flesh on contact. However, the old man clearly touches The Blob with his left hand, and that hand is not affected.
Whenever anyone is eaten by the Blob, that person cries out in pain before being consumed. This is evident when the old man yells "It's burning!", when Doc Hallen is seen in his front window being consumed, and when the auto mechanic is under the car. In addition, it seems to take several minutes before the Blob has completed with the consumption of its victims. Yet, when Kate the nurse falls victim to it, she is not heard crying out in pain, and she is consumed in only seconds.
When Steve, Jane and their friends are examining the meteorite (Blob's pod), it's clearly still hot as everyone is juggling it around like a hot potato. As the dialogue continues though, the bloke with the shell just casually continues to hold onto it.