It sounds "ta alóga and not ta áloga. am i right? or have you just got a problem with the recording?
It sounds like 'tAaloga' which is correct because there is no pause between the article and the noun. The two a's sound like a long one.
My speaker says: ταάλογα. Also correct: τ'αλογα for reason of euphony. Generally speaking, Greek avoid double α or too long α that is αα. It is a linguistic phenomenon called χασμωδία=hiatus. Many times you can see some words accompanied with an apostrophe =απόστροφο, this symbol ' . The reason is to avoid χασμωδία.