couple questions

What temp are you fermenting at? US-05 can take longer then the kit yeasts but the results are usually much better. Krausen level wont effect your bottling and I wouldnt advise bottling beer without carbing. Everything sounds ok so far my beers with us05 take about 10days, Krausen usually drops around 7 though.

At those temps it should be done soon, 22 is fairly hot for US05 though, but it'll be done very soon.
Weird about the bottles I've never heard that. are the bottles are soft or hard from the fridge? Are you using new lids?

Good questions, Ive been there. The first question about the Krausen drop, I had a SMaSh beer a couple of years back and it didnt drop ,it just floated on the top. I rang around the homebrew shops and no one could give me an answer . But one guy said wait till its really finished fermenting like 2 weeks and then rack to a bottling bucket then bottle. So thats what I did and it was a great beer. And to this day I still dont know why. But it was SO5 yeast and it was maris otter pale and cascade hops.
Yeast does some weird shit sometimes, and as much as we think we know whats going on we probably dont.
Next question about the bottles, I used to bottle years ago in old lemonaide bottles and never had any problems. If you are putting the right amount of sugar or carbo drops in each bottle should be fine. Now I say this with the greatest respect as a fellow brewer. Often when we bottle or brew we like to have a couple of shandies, and its easy to miss a few bottles when adding the drops or sugar if you know what i mean and I bet you do. lol. Some bottle infection maybe but would tend to have the opposite effect. I will sling that question to my local brewer next week and see what he says.Maybe throw away the bad bottles as they may be past their best and not holding pressure anymore, yeah that would be my guess. Good luck and let us know how you go. Cheers. Also 3 weeks is more than enough time. But now ,having said that I can remember a time when I had my brews on different shelves in a fermenting chamber i had built with the thermoostate at the top and some beers at the bottom. The beers at the bottom were carbonating at about 11 deg and never really carbonated but the ones further up did at around sort of 19 deg.
And that has just been a marathon of typingLOL, cheers mate. Are you storing some bottles at differnt temps.

At this point I would say yes to carbonating by using priming sugar or carb drops to each bottle instead of batch priming straight into the fermenting bucket. Then make sure your bottles are around 18 to 22deg for around 2 weeks, Then make sure you chill for at least 3 days and should be good to go.
Batch priming by adding to the fermenting bucket I wouldnt recommend but if you want to batch prime then get yourself a bottling bucket and rack your beer into that and at the same time gentle pour your sugar mix into it and it should mix up well. Then bottle.
Things like this go on all the time and its a great topic so thanks for posting mate.
So next bottling day use carbo drop and see how you go.Then you know where you are. cheers
Let us know how you get on. Anyway hope this is helpful i have to get back out to the shed ,half way through my boil, ITS AWESOME cheers.

Take 2 readings one day after the other if your not sure and if they are the same then I think youll be good to go bottle. Good luck. Let us know how it goes. Cheers.