Stargate SG-1 (1997) - 2 mistakes in all of series 1

Plot hole: Throughout the whole first season and some of the second, Walter or someone else in his position, counts the time it takes for something to get to its destination from when it enters the wormhole. They tend to say something like "Object should reach destination in, 5, 4, 3, 2, 1." But after the first season or two they stop and it is not brought up until later when it is said that travel through a stargate is almost instant, and in one later episode Carter says that it takes about 0.3 seconds on average to travel through a wormhole and that the travel time from the last team to come through the gate was over three seconds and that was a long time. That must mean that 5 seconds would be like traveling from another galaxy in a different dimension through a black hole.

Factual error: Earth's Stargate is dialed up more then once in series 1. Mostly in the first episodes, the passive gate is also shown with a rotating dialer ring when being called. This is not correct. The called gate only illuminates the chevrons. (This is classed as a 'factual' mistake within the show, not a 'continuity' error, and the option to change type has been removed.)