Hi! I am going to try to answer your questions
1) Does it hurt or not affect me to get a MA in Hispanic Linguistics, instead of a MA in SLA, then a PhD in SLA?
I did my MA in Applied Ling and it was during that time that I got really interested in SLA. So, I got a really high GPA from my MA program, research experience, and a more focused idea of what I want to study during my PhD before applying to SLA programs. So, to answer your question, I do not think it would hurt you at all. If you did well, you could use your higher GPA to become more competitive, especially if you also do some research work with professors. In addition, you could also use Spanish and Portuguese in some form during your dissertation work, thereby incorporating your MA.
2) What schools focus on researching methods to teach languages?
I would say that University of Arizona, University of Maryland, and University of Hawaii would be primary choices off of the top of my head. Within SLA there are normally 4 tracks, and depending on the program, you can either mix and match these four tracks or focus on one during your PhD. UMD (my school) wants us to mix all the tracks before selecting one to focus on.
3) Is it possible to get my MA at an easier reach school, then my PhD at a high reach school?
I think I already answered this in number 1. Short answer: Yes.
If you have any other questions please message me