Preterite form sometimes different is spoken Spanish?

Question

I was at a hispanic church the other Sunday and in one of the songs was the line "me amaste a mí," where the person was saying "you (God) loved me." However I noticed that the lead singer kept saying "me amasteS a mí." She is from Perú so I was thinking maybe it was a Peruvian thing but then at work that same week a Mexican man asked me, "te casastes?" rather than "te casaste?" Has anyone else heard this? Is it just a common mistake?

Answer 1

Empezastes

Here is a link to where I asked essentially the same question. Apparently it is considered just plain bad grammar (sort of like use of ain't, I guess).

Here is the answer I was given:

Dijistes, cavastes y empezastes are all wrong and unacceptable verb conjugations in Spanish. It does not matter how frequently they're used on the web. They are definitely not Spanglish. Their use just shows lack of mastery and/or poor education.

Excellent! Thank you so much :) - Sofia2015, Jul 23, 2011

Answer 2

In some regions it is commonplace to aspirate the "s" in the middle or end of a word so that "martes", for example, sounds like "martej" or "marte".

My guess is that some people will try to overcompensate by trying to "properly" pronounce everything and assume that people are aspirating an "s" at the end of the preterite when one does not actually exist.

This reminds me of when native English speakers erroneously use the construction "my friend and I" even when they should properly use "my friend and me".