Why did my friend's messages send twice?

I have an iphone and my friend has an android phone and he sent me this one message on regular message and it got sent twice why did it send twice to begin with?

My mom won't respond to her phone

It's almost 8, and my mom is usually home by 6. I tried calling her, but she doesn't pick up. It rings a couple times before going to voicemail. I tried pinpointing her location using find my iPhone, but it says "offline". My dad doesn't really care about my mom. Help Please!

Added (1). UPDATE: Thank you so much, guys! I know where my mom is. For some reason, her phone was in some type of dead zone of something like that.

How long until I get my money on PayPal?

I just sold an iPhone 7 on eBay for $360 and in total I got $354 but on PayPal, it says that the money is pending. How long do I have to wait? This is my first time selling.

IPhone 5 Screen Replacement? - 3

I don't have the money to get my iPhone 5 screen professionally replaced. I have someone to fix it for me but they haven't called me back yet so I might have to do it myself. It's my first time but I know what I'm doing. I just need to know if I'm buying the right replacement screen?
The phone is completely shattered nothing else is wrong with it just the screen.
Here's a link to a photo of what my phone looks like. IPhone 5 Screen Replacement - 3

So is this a good screen replacement to buy?
https://www.amazon.com/...01DK2FXZ6/

What phone is best for recording videos at concerts?

I have a Galaxy S6 now and went to a Metallica concert last week. I recorded my favorite songs but heard so much static. Are iPhones any better for videos or are there any different generations of androids that are better for recording videos at concerts. I'm more of an android person but debating on waiting for the next iPhone if it would a better option. I'm going to see Marilyn Manson in October and will have my upgrade before then. I don't want to buy a camera, some places don't allow bags so it will be hard to carry a camera and phone and keys, etc. I rather stick with a phone.

What's the best computers to run programs like R and ArcGIS?

I'm looking at getting a new computer and I'm pretty heavily leaning towards getting a Mac, just for the convenience of compatibility between the Mac and my iPhone mainly, and it's also pretty good for someone like myself who is a student. But I'm also going to be needing to run programs like R and ArcGIS on it and was wondering if a Mac was good enough for this or should I go for a PC? And if so, any suggestions on which particular laptop?

How to bypass parental controls forgotten passcode?

I put parental restrictions on my child's iPhone 6 iOS 10.3.3, however, I forgot the passcode I put them under. This would be an easy fix if I had not made it so difficult for myself by requiring the passcode be used to manage all location tracking, and before restarting the phone. According to wikihow.com, I should need to do either of these things. I'm not looking to install any hardware/software/anything really, is there any way I can bypass the restrictions this way? I don't mind loosing the information or data on the phone, there isn't much.