Using the Musjid as a thoroughfare

Q: To use the Musjid as a thoroughfare is makrooh. However, some ulama say that if one needs to pass through the musjid to get to the other side, then he should stop in the musjid, make one sajdah, and then pass to the other side, because sajdah is an ibaadat-e-maqsoodah, so if a person does an ibaadat-e-maqsoodah and then goes out the other way it will be jaaiz. Is this correct? Is there any other way out to this masla? Especially in places like the haram shareef and other big musjids, it becomes difficult to walk right around the musjid.

Recording one's Salaah due to frequent doubts

Q: If one has frequently doubts in salaah, that he is recording his salaah with his audio-record function of his phone to check afterwards whether he prayed correctly if some doubt arise about something. Now say he is praying Zuhr and in the last rakaat when he sits after the sajdah, he does not not know whether this was from the 1st sajdah or 2nd sajdah i.e. he cannot totally remember that he did another sajdah before it, but continues on this basis (because he can check with the audio-record anyway) and finishes his prayer. Now afterwards when he checks his audio-record it shows that he did 2 sajdahs thus prayed correctly. Is the salaah valid ?

Last time of Maghrib Salaah

Q: If one is for example about to pray Maghrib after the time of those who calculate end of maghrib time with 12 degree or 15 degree, but one is still before the time of 18 degree, should one make the intention for the adh'aa of that days Maghrib or for the qadh'aa of that days Maghrib ? For example Maghrib time is at 20:00 according to 12 degree Maghrib ends 21:15, according to 15 degree, it ends 21:40 and according to 18 degree it ends at 22:00. Now how must I make the intention if I would start praying Maghrib at 21:25 or at 21:45? Because when I am in such situation because of the waswas of what to do, I pray one time as adh'aa and after it repeat one time as qadh'aa. Should I make intention to pray the current day Maghrib, or the currents day qadh'aa of Maghrib in such a case? Or can I make intention like ''I want to pray the Fard of Maghrib of this day, which I have not prayed yet'' does such intention then count for both i.e. if it was a adh'aa it will count for adh'aa, and if it was a qadh'aa it will count for a qadh'aa? Does such an intention count according to Abu Hanifa, Imaam Muhammad, Abu Yusuf? Should I avoid that during my salaah in the above case of Maghrib that the specific time of 12 and 15 degrees falls in the middle of my salaah, since according to Abu Hanifa entering a new time during salaah would make the prayer faasid?