Both the Canon Auto Zoom 814 Electronic and Canon Auto Zoom 1014 Electronic use TTL exposure control, which means the internal lightmeter takes an average reading of the incoming light and selects the f-stop accordingly. The discrepancy you experience relates to the difference in light that is caught by the lens at the different focal lengths. It is indeed a bit like moving between a spotmeter (narrow light angle in tele) and a incident reading (wide light angle ambient). In fact, if you have a long focal length zoom lens, such as on the 1014, you can mimick taking spotmeter readings by using the tele – if you don't have a spotmeter at hand.
The decision on whether to go for the one f-stop suggested by the camera in tele, or the one suggested when in wide angle, depends on what you are filming. If the contrasts would too stark and the overall image to underexposed in wide, but spot on in tele, e.g. when zooming out of a shady olive grove into a tele of the bright sunlit Mediterranean sea (with lots of light reflection on the sea surface), then you may want to actually select an average value between the two extremes f-stops at either end. You can also pick one in a slightly weighted manner, so not just the mid-point f-stop, but rather weight it to retain some of the shade of the olive grove at the beginning, and overemphasise the glare of the sea in tele. Or vice versa. If you have f/22 and f/8, pick either f/16 or f/11, or an in-between between the two for a dead-on average, using the manual exposure control of the camera.
Now, I don't know what you were shooting, where, indoors or outdoors, with light set or merely available light, at what time of day in what light conditions, and above all what aesthetic you are actually after, if you used ND filters etc. etc. etc. But, in crude generality, as you are shooting with negative, and 7219 at that, you will find that the film stock has such latitude that you are unlikely to receive back totally overexposed or underexposed material during a travelling through the zoom range. Your concern was much more relevant during the low-sensitivity reversal film era, the Kodachrome nostalgia that some people still indulge in.
Don't forget, the 'art' in the art form of cinematography is to master the technical aspects, alright, and then override this technocratic rulebook with the intuitive feeling gained from shooting experience to get the right result you desire