That's very helpful and sounds like too much salt, which might explain why you're not reaching the test end-point.
I've bought salt in both 20 and 25 kg bags, so if you can read the weight of bag in the photo, that would be helpful.
If it's 20 kg bags, you have 6700 ppm salt. (33-34 drops)
If it's 25 kg bags, you have 8300 ppm salt. (41-42 drops)
So based on that, you would have reached the endpoint within 50 drops. One trick with the reagents is to hold the bottle vertical (upside down of course) and squeeze gently, so each drop fully forms and then falls away from the bottle. Around one drop per second, squeezing gently, is about right for most people. If you go too quick, the drops will be smaller and have less than the intended effect, and therefore require more drops to reach the endpoint. It doesn't make much difference when doing 10 drops, but on 40/50 drops, it could be noticeable.
I can't find a maximum salt level for your chlorinator. They always provide a minimum for SWCs, but some have electronics that can handle very high salt levels. One brand here can be used in an ocean water pool (35,000 ppm salt) while others have a maximum around 6,000 ppm salt. I found one comment on the Astral website suggesting 6,000 for winter (15 degree water). So I sent them an inquiry and I'll let you know if I hear back.
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The SWC will have electronics to protect itself, so don't worry about the high salt until we know more. We certainly know you have enough