In warsh for 2 hamzah with same vowels in 2 different words, according to your website you can read in 2 ways

Question
In warsh for 2 hamzah with same vowels in 2 different words, according to your website http://www.abouttajweed.com/warsh/lesson-five.html

you can read in 2 ways
1. Tasheel of the 2nd hamzah
2. reading ibdaal of the second hamzah a medd letter and a complete medd of six vowel counts if the letter following is saakin, and two vowel counts if a voweled letter is after the second hamzah. 

now all the readers i have listen to abdul basit khaleel al husary etc (they do ibdaal,not tasheel)
 do ibdaal but they only read 1 hamzah e.g. IN SURAH NISAA AND MAIDAH IN THE WORD  `jaaaaaa aaahaduminkum`
in this e.g. the 2nd hamzah is changed into ibdaal with qasr but what about the hamzah before it, does that get dropped.

COULD YOU EXPLAIN THE 2ND WAY IN MORE DETAIL (IBDAAL)
 either i am not understanding the explanation properly or they has been a mistake in your website?

Answer

Ibdaal is changing the hamzah into another letter, meaning the hamzah is no longer pronounced in ibdaal and another letter is pronounced instead.  In the case of two hamzahs with the same vowel for Warsh between two words, when there is ibdaal, the second hamzah is not pronounced at all like a hamzah and instead becomes a medd letter.  What you are hearing is the first hamzah (the hamzah on the end of the first word), and that is correct, then after that the medd letter is pronounced sounding like an extension of the first hamzah.  This is what ibdaal is. 
Insha' Allah this is clearer, if not, please feel free to ask more questions.