Sunnats and aadaab of wudhu

Q: What is the ruling of drinking the leftover water of wudhu (fadl wudhu) whilst standing? 

In Dars Tirmizi (vol. 1, pg. 259) — taken from Duroos Madaniyya of Moulana Husain Ahmad Madani رحمة الله عليه — it is mentioned that Ibn Abidin (al-Shami) did not regard it as mustahabb, and that the ahadith on this issue cannot be used to establish istiḥbab. 

However, in Fatawa Mahmoodiyyah (vol. 8, pg. 123) the words of Ibn Abidin (al-Shami) in Radd al-Muhtar are quoted as proof that drinking fadl wudhu whilst standing or sitting is mustahabb. 

My questions are: 

1. According to the Hanafi madhhab, is drinking fadl wudhu mustahabb or not? 

2. What is the correct position of Ibn Abidin (al-Shami) in this matter? 

3. If it is mustahabb, is it specifically recommended to drink it while standing, or is sitting still better? 

4. How should the apparent contradiction between Duroos Madaniyya/Dars Tirmizi and Fatawa Mahmoodiyyah be reconciled?

Q: I was recently diagnosed with OCD, which results in me having a lot of doubts about things. However, I’ve been working on getting better Alhamdulillah. I just had a quick question regarding what to do in the following ghusl/wudhu scenarios: 

(1) In Wudhu, when I wash my face, water also rolls down my arms and also splashes or falls off my face onto my arms. Then when I go to pour water on my arm, I’m not sure which part of my arm is wet with the fresh water or wet with the water that rolled/splashed off my face onto my arm. What to do in this scenario? 

(2) In Ghusl, I often doubt whether water has reached the skin under my beard. I have a beard wash soap, which I usually rub fully into my beard then wash the soap away while rubbing my beard with my hands. Once the soap has been rubbed and washed away from the beard, can I assume that the skin underneath the beard has also been washed? 

(3) In Wudhu I try to just wash 3 times and move on. However sometimes I forget whether I have washed 2 or 3 times. What do in this scenario?

Q: I am in a state of ritual impurity and water is available, but I am unable to perform ablution due to shyness and lack of time.

Q: I have a pain in my hand and was advised by a physiotherapist to tape it using kinesiology/sports tape. The tape is difficult to remove once its stuck and it falls off on its own after a few days. Will wudhu be valid if I make masah over the tape?

Q: If one’s limb is dry after making wudhu and one is unsure if the whole feet or face was washed and one read salaah with that wudhu, does the salaah need to be repeated?

Q: What is the correct method of gargling the mouth for Shawafi?

Q: In wudhu, if sometimes we wash all the parts one time instead of 3 times, can we offer salah with this wudhu?

Q: If I wash my feet for wudhu by putting my feet in an empty bucket and pouring water on it and then wiping it. I do this 3 times for each foot. In-between the times that I wash my feet, my feet touch the water in the bucket that has dropped off my feet. Is my wudhu valid?

Q: Is it permissible if we wash all parts (limbs) in wudhu one time?