Times of Salaah

Salaah time expiring while one is performing Salaah

Q: If salah was delayed nearing to the end of its time and the takbeer for commencing the salah was made within the time, for example within dhuhr time, however, the salah was completed when asr time set in then will the salah be counted as a qadha salah or will it officially count and also will this count as missing salah within its time thus meaning one is sinful or will it be sinful for other reasons such as the sin for delaying and is there a difference in severity between these two sins?

Hanafi performing asr salaah in Shaafi'ee time

Q: When we go for umrah, all the umrah busses stop for asr prayer according to shafiee time. We (ladies) strictly follow hanafi time. In winters, due to school, we read our zuhur salah after the shafiee asr azan, as hanafi zuhur salaah time is still there. We also read our asr according to hanafi time i.e. late.

So my question is... the bus stops for asr at shafiee time. If we do not get the jamaat, what should we do? Can we read at shafiee time at such circumstances? 

Next salaah time entering while one is performing salaah

Q: I am currently excused (chronic excuse) with regards to wudu due to bleeding. I know that my wudu breaks when the next prayer time comes in. However once or twice I took too long to pray and when I checked the time, I was a few minutes into the next prayer time. Are those prayers invalid? Would they be invalid if I wasn't excused with regards to wudu?