Stand up!
Possibly irrelevant comment: In Danish, ‘stå op’ also means ‘get out of bed’. ‘I get up every morning at 7am’ is in Danish ‘Jeg står op hver morgen klokken 7’. I have no idea whether that is a valid expression in Swedish.
In German it’s the same: “Steh auf.”
When a mother tries to wake her child for school and the child doesn’t want to get out of bed, the mother would repeat, “Steh auf.”
With the translation pairs on Clozemaster I always assume the English sentence existed first and then English was translated to the other language. English to Swedish is unambiguous in this case. But as you say, Swedish to English is ambiguous. But I always assume the English sentence existed first.
I am not as forgiving as you. I am paying to learn Swedish and therefore I will not tolerate errors in the Swedish examples no matter what.
I see where you are coming from; when lerning something (a language or anything else) you expect that the information you are being given is correct, since you are not yet able to discern it yourself yet. I agree with you that is a fair expectation.
I don’t know swedish well enough to confirm or deny this being a good translation, but having a look at the dictionnary (see stå upp, which seems to give, at least, one definition that matches, and which forwards to uppstå, where stand up is directly mentioned) seems to lead towards the idea of this being a correct translation.
Setting this aside, though, it seems to me that compeletely discarding a translation because there is some ambiguity is a bit excessive; since each language maps concepts to words differently, it is impossible that all words and sentences have a 1 to 1 translation. So there is bound to have nuance that is lost in translation and translations that are ambiguous without copious amount of context.
To come back to something more concrete, in my opinion, the fact that “stå upp!” can mean other things aside that “stand up!”, doesn’t make “stand up” be incorrect as a tranlation, especially if we are lackkng the context that could help choose between one or another translation
The Swedish equivalent of Danish “Stå op!” is “Stig upp!”. As for “Stand up!”, I prefer “Res dig upp!” or “Ställ dig upp!”.
The ambiguity is very difficult to do anything about. We don’t see the context on Clozemaster whereas if a sentence is taken from a movie’s subtitles, and you are watching the movie, the situation is very different.
Are you aware how Clozemaster works? It uses the website Tatoeba as source material. Tatoeba links sentences that might have been created independently from each other.
German doesn’t make such distinctions. Interesting.
Yes, I am aware of that but I feel strongly that it is not relevant to me. I am a paying customer, and I don’t want to be given wrong examples in the language I am trying to learn. I can tell you I have given up on three similar web services because of poor quality source material. Clozemaster is the best I have tried so far.
I heard a while back, before I started learning Swedish, that Duolingo had started to use AI for adding content. I wrote to them and asked if there was any way I could tell whether some particular content was created by a human or AI. They said no.
I have to agree with you here; while Tatoebas’ content is mostly out of Clozemasters control, it is their decision to use it as base source for their service. If the source material is incorrect (altough it seems that I might be more lenient on what is, or not, correct 
), it’s on them to either correct it for the service or choose another source. And while it is very useful addition that options are given to edit sentnces for one self, it doesn’t change the fact that they are marketing the app as a way to learn languages, not as a way to learn Tatoebas’ corpus (in which case, the errors or inacuracies would be a feature rather than a bug ).
So, even if I find that it is only human that there be a few errors here and there, it is, in my opinion, perfectly reasonable to complain about them, so that the experience matches what is advertised.